1400251264 has 16 divisors (see below), whose sum is σ = 2789563320. Its totient is φ = 700125568.

The previous prime is 1400251261. The next prime is 1400251289. The reversal of 1400251264 is 4621520041.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400251261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5469604 + ... + 5469859.

Almost surely, 2^1400251264 is an apocalyptic number.

It is an amenable number.

1400251264 is a deficient number, since it is larger than the sum of its proper divisors (1389312056).

1400251264 is an equidigital number, since it uses as much as digits as its factorization.

1400251264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10939477 (or 10939465 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1400251264 is about 37419.9313735341. The cubic root of 1400251264 is about 1118.7558633776.

The spelling of 1400251264 in words is "one billion, four hundred million, two hundred fifty-one thousand, two hundred sixty-four".