1157905402 has 4 divisors (see below), whose sum is σ = 1736858106. Its totient is φ = 578952700.

The previous prime is 1157905387. The next prime is 1157905403. The reversal of 1157905402 is 2045097511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2045097511 = 47 ⋅43512713.

It can be written as a sum of positive squares in only one way, i.e., 1147786641 + 10118761 = 33879^2 + 3181^2 .

It is not an unprimeable number, because it can be changed into a prime (1157905403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289476349 + ... + 289476352.

Almost surely, 2^1157905402 is an apocalyptic number.

1157905402 is a deficient number, since it is larger than the sum of its proper divisors (578952704).

1157905402 is an equidigital number, since it uses as much as digits as its factorization.

1157905402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578952703.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1157905402 is about 34028.0090807558. The cubic root of 1157905402 is about 1050.0847707825.

The spelling of 1157905402 in words is "one billion, one hundred fifty-seven million, nine hundred five thousand, four hundred two".