1157690 has 8 divisors (see below), whose sum is σ = 2083860. Its totient is φ = 463072.

The previous prime is 1157671. The next prime is 1157699. The reversal of 1157690 is 967511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1067089 + 90601 = 1033^2 + 301^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1157690² = 2680492272200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1157699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57875 + ... + 57894.

2^1157690 is an apocalyptic number.

1157690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1157690 is a deficient number, since it is larger than the sum of its proper divisors (926170).

1157690 is a wasteful number, since it uses less digits than its factorization.

1157690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115776.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1157690 is about 1075.9600364326. The cubic root of 1157690 is about 105.0019651938.

The spelling of 1157690 in words is "one million, one hundred fifty-seven thousand, six hundred ninety".