1157111402 has 4 divisors (see below), whose sum is σ = 1735667106. Its totient is φ = 578555700.

The previous prime is 1157111387. The next prime is 1157111407. The reversal of 1157111402 is 2041117511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2041117511 = 1087 ⋅1877753.

It can be written as a sum of positive squares in only one way, i.e., 947469961 + 209641441 = 30781^2 + 14479^2 .

It is not an unprimeable number, because it can be changed into a prime (1157111407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289277849 + ... + 289277852.

Almost surely, 2^1157111402 is an apocalyptic number.

1157111402 is a deficient number, since it is larger than the sum of its proper divisors (578555704).

1157111402 is an equidigital number, since it uses as much as digits as its factorization.

1157111402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578555703.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 1157111402 is about 34016.3402205469. The cubic root of 1157111402 is about 1049.8446941878.

Adding to 1157111402 its reverse (2041117511), we get a palindrome (3198228913).

The spelling of 1157111402 in words is "one billion, one hundred fifty-seven million, one hundred eleven thousand, four hundred two".