1057631 has 2 divisors, whose sum is σ = 1057632. Its totient is φ = 1057630.

The previous prime is 1057613. The next prime is 1057633. The reversal of 1057631 is 1367501.

Together with previous prime (1057613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1367501) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1057631 is a prime.

It is a super-2 number, since 2×1057631² = 2237166664322, which contains 22 as substring.

Together with 1057633, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₈₂₆₆₁ and since 1057631 and 82661 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1057597 and 1057606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1057633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528815 + 528816.

It is an arithmetic number, because the mean of its divisors is an integer number (528816).

2^1057631 is an apocalyptic number.

1057631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1057631 is an equidigital number, since it uses as much as digits as its factorization.

1057631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 1057631 is about 1028.4118824673. The cubic root of 1057631 is about 101.8852676366.

The spelling of 1057631 in words is "one million, fifty-seven thousand, six hundred thirty-one".