1158405057 has 28 divisors (see below), whose sum is σ = 1754120724. Its totient is φ = 764575200.

The previous prime is 1158404999. The next prime is 1158405071. The reversal of 1158405057 is 7505048511.

It can be written as a sum of positive squares in 2 ways, for example, as 653773761 + 504631296 = 25569^2 + 22464^2 .

It is not a de Polignac number, because 1158405057 - 2¹⁰ = 1158404033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1158406057) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 65763 + ... + 81495.

Almost surely, 2^1158405057 is an apocalyptic number.

It is an amenable number.

1158405057 is a deficient number, since it is larger than the sum of its proper divisors (595715667).

1158405057 is an equidigital number, since it uses as much as digits as its factorization.

1158405057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15852 (or 15837 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The square root of 1158405057 is about 34035.3501083800. The cubic root of 1158405057 is about 1050.2357919437.

The spelling of 1158405057 in words is "one billion, one hundred fifty-eight million, four hundred five thousand, fifty-seven".