1401425550 has 120 divisors (see below), whose sum is σ = 4450246416. Its totient is φ = 320319360.

The previous prime is 1401425537. The next prime is 1401425563. The reversal of 1401425550 is 555241041.

1401425550 is a `hidden beast` number, since 1 + 401 + 4 + 255 + 5 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1401425537) and next prime (1401425563).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3634 + ... + 53066.

Almost surely, 2^1401425550 is an apocalyptic number.

1401425550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401425550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2225123208).

1401425550 is an abundant number, since it is smaller than the sum of its proper divisors (3048820866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1401425550 is a wasteful number, since it uses less digits than its factorization.

1401425550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49464 (or 49450 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1401425550 is about 37435.6187340346. The cubic root of 1401425550 is about 1119.0685149489.

Adding to 1401425550 its reverse (555241041), we get a palindrome (1956666591).

It can be divided in two parts, 1401425 and 550, that added together give a triangular number (1401975 = T₁₆₇₄).

The spelling of 1401425550 in words is "one billion, four hundred one million, four hundred twenty-five thousand, five hundred fifty".