1631157 has 8 divisors (see below), whose sum is σ = 2372640. Its totient is φ = 988560.

The previous prime is 1631153. The next prime is 1631159. The reversal of 1631157 is 7511361.

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

It is not a de Polignac number, because 1631157 - 2² = 1631153 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631153) 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, 24682 + ... + 24747.

It is an arithmetic number, because the mean of its divisors is an integer number (296580).

2^1631157 is an apocalyptic number.

It is an amenable number.

1631157 is a deficient number, since it is larger than the sum of its proper divisors (741483).

1631157 is a wasteful number, since it uses less digits than its factorization.

1631157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49443.

The product of its digits is 630, while the sum is 24.

The square root of 1631157 is about 1277.1675692719. The cubic root of 1631157 is about 117.7150310196.

The spelling of 1631157 in words is "one million, six hundred thirty-one thousand, one hundred fifty-seven".