1157261831 has 8 divisors (see below), whose sum is σ = 1263006864. Its totient is φ = 1051606720.

The previous prime is 1157261827. The next prime is 1157261867. The reversal of 1157261831 is 1381627511.

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

It is a cyclic number.

It is not a de Polignac number, because 1157261831 - 2² = 1157261827 is a prime.

It is a super-2 number, since 2×1157261831² = 2678509890978945122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1157261791 and 1157261800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157261801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6011 + ... + 48483.

It is an arithmetic number, because the mean of its divisors is an integer number (157875858).

Almost surely, 2^1157261831 is an apocalyptic number.

1157261831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1157261831 is a deficient number, since it is larger than the sum of its proper divisors (105745033).

1157261831 is a wasteful number, since it uses less digits than its factorization.

1157261831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44961.

The product of its digits is 10080, while the sum is 35.

The square root of 1157261831 is about 34018.5512772076. The cubic root of 1157261831 is about 1049.8901868528.

The spelling of 1157261831 in words is "one billion, one hundred fifty-seven million, two hundred sixty-one thousand, eight hundred thirty-one".