1255124251 has 4 divisors (see below), whose sum is σ = 1256823400. Its totient is φ = 1253425104.

The previous prime is 1255124207. The next prime is 1255124261. The reversal of 1255124251 is 1524215521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1524215521 = 27449 ⋅55529.

It is a cyclic number.

It is not a de Polignac number, because 1255124251 - 2²⁵ = 1221569819 is a prime.

It is a super-2 number, since 2×1255124251² = 3150673770896622002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255124201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848466 + ... + 849943.

It is an arithmetic number, because the mean of its divisors is an integer number (314205850).

Almost surely, 2^1255124251 is an apocalyptic number.

1255124251 is a deficient number, since it is larger than the sum of its proper divisors (1699149).

1255124251 is an equidigital number, since it uses as much as digits as its factorization.

1255124251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699148.

The product of its digits is 4000, while the sum is 28.

The square root of 1255124251 is about 35427.7327950858. The cubic root of 1255124251 is about 1078.6873200518.

Adding to 1255124251 its reverse (1524215521), we get a palindrome (2779339772).

The spelling of 1255124251 in words is "one billion, two hundred fifty-five million, one hundred twenty-four thousand, two hundred fifty-one".