1231057 has 4 divisors (see below), whose sum is σ = 1246720. Its totient is φ = 1215396.

The previous prime is 1231051. The next prime is 1231063. The reversal of 1231057 is 7501321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7501321 = 857 ⋅8753.

It is an interprime number because it is at equal distance from previous prime (1231051) and next prime (1231063).

It is a cyclic number.

It is not a de Polignac number, because 1231057 - 2³ = 1231049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231051) 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, 7713 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (311680).

2^1231057 is an apocalyptic number.

It is an amenable number.

1231057 is a deficient number, since it is larger than the sum of its proper divisors (15663).

1231057 is an equidigital number, since it uses as much as digits as its factorization.

1231057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15662.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1231057 is about 1109.5300807098. The cubic root of 1231057 is about 107.1748096024.

Adding to 1231057 its reverse (7501321), we get a palindrome (8732378).

The spelling of 1231057 in words is "one million, two hundred thirty-one thousand, fifty-seven".