1255695131 has 4 divisors (see below), whose sum is σ = 1270824072. Its totient is φ = 1240566192.

The previous prime is 1255695121. The next prime is 1255695169. The reversal of 1255695131 is 1315965521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1315965521 = 13 ⋅101228117.

It is a cyclic number.

It is not a de Polignac number, because 1255695131 - 2¹⁴ = 1255678747 is a prime.

It is a super-2 number, since 2×1255695131² = 3153540524034214322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255695121) 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, 7564346 + ... + 7564511.

It is an arithmetic number, because the mean of its divisors is an integer number (317706018).

Almost surely, 2^1255695131 is an apocalyptic number.

1255695131 is a deficient number, since it is larger than the sum of its proper divisors (15128941).

1255695131 is an equidigital number, since it uses as much as digits as its factorization.

1255695131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15128940.

The product of its digits is 40500, while the sum is 38.

The square root of 1255695131 is about 35435.7888440486. The cubic root of 1255695131 is about 1078.8508384383.

The spelling of 1255695131 in words is "one billion, two hundred fifty-five million, six hundred ninety-five thousand, one hundred thirty-one".