1251453919 has 2 divisors, whose sum is σ = 1251453920. Its totient is φ = 1251453918.

The previous prime is 1251453901. The next prime is 1251453937. The reversal of 1251453919 is 9193541521.

It is a balanced prime because it is at equal distance from previous prime (1251453901) and next prime (1251453937).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251453919 is a prime.

It is a super-2 number, since 2×1251453919² = 3132273822760917122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251453949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625726959 + 625726960.

It is an arithmetic number, because the mean of its divisors is an integer number (625726960).

Almost surely, 2^1251453919 is an apocalyptic number.

1251453919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251453919 is an equidigital number, since it uses as much as digits as its factorization.

1251453919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 40.

The square root of 1251453919 is about 35375.8946035291. The cubic root of 1251453919 is about 1077.6348329968.

The spelling of 1251453919 in words is "one billion, two hundred fifty-one million, four hundred fifty-three thousand, nine hundred nineteen".