1255631 has 4 divisors (see below), whose sum is σ = 1352232. Its totient is φ = 1159032.

The previous prime is 1255619. The next prime is 1255633. The reversal of 1255631 is 1365521.

1255631 = T₄₃₃ + T₄₃₄ + ... + T₄₄₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1365521 = 419 ⋅3259.

It is a cyclic number.

It is not a de Polignac number, because 1255631 - 2⁶ = 1255567 is a prime.

It is a super-2 number, since 2×1255631² = 3153218416322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1255597 and 1255606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48281 + ... + 48306.

It is an arithmetic number, because the mean of its divisors is an integer number (338058).

2^1255631 is an apocalyptic number.

1255631 is a deficient number, since it is larger than the sum of its proper divisors (96601).

1255631 is an equidigital number, since it uses as much as digits as its factorization.

1255631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96600.

The product of its digits is 900, while the sum is 23.

The square root of 1255631 is about 1120.5494188120. The cubic root of 1255631 is about 107.8832471729.

The spelling of 1255631 in words is "one million, two hundred fifty-five thousand, six hundred thirty-one".