1956157 has 4 divisors (see below), whose sum is σ = 2235616. Its totient is φ = 1676700.

The previous prime is 1956109. The next prime is 1956161. The reversal of 1956157 is 7516591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7516591 = 73 ⋅102967.

It is a cyclic number.

It is not a de Polignac number, because 1956157 - 2⁷ = 1956029 is a prime.

It is a Duffinian number.

1956157 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956257) 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, 139719 + ... + 139732.

It is an arithmetic number, because the mean of its divisors is an integer number (558904).

2^1956157 is an apocalyptic number.

It is an amenable number.

1956157 is a deficient number, since it is larger than the sum of its proper divisors (279459).

1956157 is an equidigital number, since it uses as much as digits as its factorization.

1956157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279458.

The product of its digits is 9450, while the sum is 34.

The square root of 1956157 is about 1398.6268265695. The cubic root of 1956157 is about 125.0646492247.

The spelling of 1956157 in words is "one million, nine hundred fifty-six thousand, one hundred fifty-seven".