1970157 has 16 divisors (see below), whose sum is σ = 3133440. Its totient is φ = 1076592.

The previous prime is 1970149. The next prime is 1970161. The reversal of 1970157 is 7510791.

It is not a de Polignac number, because 1970157 - 2³ = 1970149 is a prime.

1970157 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1970257) 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, 1557 + ... + 2522.

It is an arithmetic number, because the mean of its divisors is an integer number (195840).

2^1970157 is an apocalyptic number.

It is an amenable number.

1970157 is a deficient number, since it is larger than the sum of its proper divisors (1163283).

1970157 is a wasteful number, since it uses less digits than its factorization.

1970157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112.

The product of its (nonzero) digits is 2205, while the sum is 30.

The square root of 1970157 is about 1403.6228125818. The cubic root of 1970157 is about 125.3622982387.

The spelling of 1970157 in words is "one million, nine hundred seventy thousand, one hundred fifty-seven".