1255432521 has 32 divisors (see below), whose sum is σ = 1949875200. Its totient is φ = 703644480.

The previous prime is 1255432501. The next prime is 1255432547. The reversal of 1255432521 is 1252345521.

It is not a de Polignac number, because 1255432521 - 2⁵ = 1255432489 is a prime.

It is a super-2 number, since 2×1255432521² = 3152221629568830882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255432501) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 535570 + ... + 537908.

It is an arithmetic number, because the mean of its divisors is an integer number (60933600).

Almost surely, 2^1255432521 is an apocalyptic number.

It is an amenable number.

1255432521 is a deficient number, since it is larger than the sum of its proper divisors (694442679).

1255432521 is a wasteful number, since it uses less digits than its factorization.

1255432521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829.

The product of its digits is 12000, while the sum is 30.

The square root of 1255432521 is about 35432.0832156395. The cubic root of 1255432521 is about 1078.7756246478.

The spelling of 1255432521 in words is "one billion, two hundred fifty-five million, four hundred thirty-two thousand, five hundred twenty-one".