1400865157 has 2 divisors, whose sum is σ = 1400865158. Its totient is φ = 1400865156.

The previous prime is 1400865149. The next prime is 1400865187. The reversal of 1400865157 is 7515680041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863830881 + 537034276 = 29391^2 + 23174^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400865157 - 2³ = 1400865149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400865187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700432578 + 700432579.

It is an arithmetic number, because the mean of its divisors is an integer number (700432579).

Almost surely, 2^1400865157 is an apocalyptic number.

It is an amenable number.

1400865157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400865157 is an equidigital number, since it uses as much as digits as its factorization.

1400865157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1400865157 is about 37428.1332288961. The cubic root of 1400865157 is about 1118.9193330985.

The spelling of 1400865157 in words is "one billion, four hundred million, eight hundred sixty-five thousand, one hundred fifty-seven".