1251453901 has 2 divisors, whose sum is σ = 1251453902. Its totient is φ = 1251453900.

The previous prime is 1251453883. The next prime is 1251453919. The reversal of 1251453901 is 1093541521.

It is a balanced prime because it is at equal distance from previous prime (1251453883) and next prime (1251453919).

It can be written as a sum of positive squares in only one way, i.e., 1242633001 + 8820900 = 35251^2 + 2970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251453901 - 2⁹ = 1251453389 is a prime.

It is a super-2 number, since 2×1251453901² = 3132273732656235602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251453971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625726950 + 625726951.

It is an arithmetic number, because the mean of its divisors is an integer number (625726951).

Almost surely, 2^1251453901 is an apocalyptic number.

It is an amenable number.

1251453901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251453901 is an equidigital number, since it uses as much as digits as its factorization.

1251453901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1251453901 is about 35375.8943491186. The cubic root of 1251453901 is about 1077.6348278301.

The spelling of 1251453901 in words is "one billion, two hundred fifty-one million, four hundred fifty-three thousand, nine hundred one".