1400252591 has 2 divisors, whose sum is σ = 1400252592. Its totient is φ = 1400252590.

The previous prime is 1400252543. The next prime is 1400252603. The reversal of 1400252591 is 1952520041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400252591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400252891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700126295 + 700126296.

It is an arithmetic number, because the mean of its divisors is an integer number (700126296).

Almost surely, 2^1400252591 is an apocalyptic number.

1400252591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400252591 is an equidigital number, since it uses as much as digits as its factorization.

1400252591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1400252591 is about 37419.9491047222. The cubic root of 1400252591 is about 1118.7562167877.

The spelling of 1400252591 in words is "one billion, four hundred million, two hundred fifty-two thousand, five hundred ninety-one".