1251423122 has 4 divisors (see below), whose sum is σ = 1877134686. Its totient is φ = 625711560.

The previous prime is 1251423083. The next prime is 1251423127. The reversal of 1251423122 is 2213241521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1250258881 + 1164241 = 35359^2 + 1079^2 .

It is not an unprimeable number, because it can be changed into a prime (1251423127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312855779 + ... + 312855782.

Almost surely, 2^1251423122 is an apocalyptic number.

1251423122 is a deficient number, since it is larger than the sum of its proper divisors (625711564).

1251423122 is an equidigital number, since it uses as much as digits as its factorization.

1251423122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625711563.

The product of its digits is 960, while the sum is 23.

The square root of 1251423122 is about 35375.4593185728. The cubic root of 1251423122 is about 1077.6259930942.

Adding to 1251423122 its reverse (2213241521), we get a palindrome (3464664643).

The spelling of 1251423122 in words is "one billion, two hundred fifty-one million, four hundred twenty-three thousand, one hundred twenty-two".