1157073731 has 16 divisors (see below), whose sum is σ = 1298469120. Its totient is φ = 1021805280.

The previous prime is 1157073677. The next prime is 1157073733. The reversal of 1157073731 is 1373707511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1157073731 - 2¹⁴ = 1157057347 is a prime.

It is a super-2 number, since 2×1157073731² = 2677639237940520722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1157073691 and 1157073700.

It is not an unprimeable number, because it can be changed into a prime (1157073733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298850 + ... + 302696.

It is an arithmetic number, because the mean of its divisors is an integer number (81154320).

Almost surely, 2^1157073731 is an apocalyptic number.

1157073731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1157073731 is a deficient number, since it is larger than the sum of its proper divisors (141395389).

1157073731 is a wasteful number, since it uses less digits than its factorization.

1157073731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634.

The product of its (nonzero) digits is 15435, while the sum is 35.

The square root of 1157073731 is about 34015.7864968605. The cubic root of 1157073731 is about 1049.8333011250.

The spelling of 1157073731 in words is "one billion, one hundred fifty-seven million, seventy-three thousand, seven hundred thirty-one".