1421031550 has 12 divisors (see below), whose sum is σ = 2643118776. Its totient is φ = 568412600.

The previous prime is 1421031499. The next prime is 1421031551. The reversal of 1421031550 is 551301241.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421031551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14210266 + ... + 14210365.

It is an arithmetic number, because the mean of its divisors is an integer number (220259898).

Almost surely, 2^1421031550 is an apocalyptic number.

1421031550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421031550 is a deficient number, since it is larger than the sum of its proper divisors (1222087226).

1421031550 is a wasteful number, since it uses less digits than its factorization.

1421031550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28420643 (or 28420638 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1421031550 is about 37696.5721253273. The cubic root of 1421031550 is about 1124.2629707482.

Adding to 1421031550 its reverse (551301241), we get a palindrome (1972332791).

The spelling of 1421031550 in words is "one billion, four hundred twenty-one million, thirty-one thousand, five hundred fifty".