1965157 has 4 divisors (see below), whose sum is σ = 1984716. Its totient is φ = 1945600.

The previous prime is 1965133. The next prime is 1965167. The reversal of 1965157 is 7515691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1766241 + 198916 = 1329^2 + 446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1965157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965167) 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, 9628 + ... + 9829.

It is an arithmetic number, because the mean of its divisors is an integer number (496179).

2^1965157 is an apocalyptic number.

It is an amenable number.

1965157 is a deficient number, since it is larger than the sum of its proper divisors (19559).

1965157 is a wasteful number, since it uses less digits than its factorization.

1965157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19558.

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

The square root of 1965157 is about 1401.8405758145. The cubic root of 1965157 is about 125.2561573753.

It can be divided in two parts, 1965 and 157, that multiplied together give a triangular number (308505 = T₇₈₅).

The spelling of 1965157 in words is "one million, nine hundred sixty-five thousand, one hundred fifty-seven".