1231051 has 2 divisors, whose sum is σ = 1231052. Its totient is φ = 1231050.

The previous prime is 1231049. The next prime is 1231063. The reversal of 1231051 is 1501321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231051 - 2¹ = 1231049 is a prime.

Together with 1231049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1231001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615525 + 615526.

It is an arithmetic number, because the mean of its divisors is an integer number (615526).

2^1231051 is an apocalyptic number.

1231051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231051 is an equidigital number, since it uses as much as digits as its factorization.

1231051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1231051 is about 1109.5273768592. The cubic root of 1231051 is about 107.1746354837.

Adding to 1231051 its reverse (1501321), we get a palindrome (2732372).

The spelling of 1231051 in words is "one million, two hundred thirty-one thousand, fifty-one".