1201402550 has 24 divisors (see below), whose sum is σ = 2242262736. Its totient is φ = 478915040.

The previous prime is 1201402519. The next prime is 1201402567. The reversal of 1201402550 is 552041021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26354 + ... + 55653.

It is an arithmetic number, because the mean of its divisors is an integer number (93427614).

Almost surely, 2^1201402550 is an apocalyptic number.

1201402550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201402550 is a deficient number, since it is larger than the sum of its proper divisors (1040860186).

1201402550 is a wasteful number, since it uses less digits than its factorization.

1201402550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82312 (or 82307 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1201402550 is about 34661.2543050594. The cubic root of 1201402550 is about 1063.0724168173.

Adding to 1201402550 its reverse (552041021), we get a palindrome (1753443571).

The spelling of 1201402550 in words is "one billion, two hundred one million, four hundred two thousand, five hundred fifty".