1157990 has 16 divisors (see below), whose sum is σ = 2133648. Its totient is φ = 452256.

The previous prime is 1157987. The next prime is 1158007. The reversal of 1157990 is 997511.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (133353).

2^1157990 is an apocalyptic number.

1157990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1157990 is a deficient number, since it is larger than the sum of its proper divisors (975658).

1157990 is a wasteful number, since it uses less digits than its factorization.

1157990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 1157990 is about 1076.0994377844. The cubic root of 1157990 is about 105.0110343657.

The spelling of 1157990 in words is "one million, one hundred fifty-seven thousand, nine hundred ninety".