1255270521 has 16 divisors (see below), whose sum is σ = 1692106560. Its totient is φ = 827659200.

The previous prime is 1255270519. The next prime is 1255270529. The reversal of 1255270521 is 1250725521.

It is not a de Polignac number, because 1255270521 - 2¹ = 1255270519 is a prime.

It is a super-2 number, since 2×1255270521² = 3151408161783222882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255270529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387135 + ... + 390363.

It is an arithmetic number, because the mean of its divisors is an integer number (105756660).

Almost surely, 2^1255270521 is an apocalyptic number.

It is an amenable number.

1255270521 is a deficient number, since it is larger than the sum of its proper divisors (436836039).

1255270521 is a wasteful number, since it uses less digits than its factorization.

1255270521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 1255270521 is about 35429.7970781657. The cubic root of 1255270521 is about 1078.7292212063.

The spelling of 1255270521 in words is "one billion, two hundred fifty-five million, two hundred seventy thousand, five hundred twenty-one".