1157439287 has 2 divisors, whose sum is σ = 1157439288. Its totient is φ = 1157439286.

The previous prime is 1157439259. The next prime is 1157439331. The reversal of 1157439287 is 7829347511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1157439287 - 2¹⁶ = 1157373751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157439187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578719643 + 578719644.

It is an arithmetic number, because the mean of its divisors is an integer number (578719644).

Almost surely, 2^1157439287 is an apocalyptic number.

1157439287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157439287 is an equidigital number, since it uses as much as digits as its factorization.

1157439287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 47.

The square root of 1157439287 is about 34021.1594011727. The cubic root of 1157439287 is about 1049.9438479420.

The spelling of 1157439287 in words is "one billion, one hundred fifty-seven million, four hundred thirty-nine thousand, two hundred eighty-seven".