1872791 has 4 divisors (see below), whose sum is σ = 1937400. Its totient is φ = 1808184.

The previous prime is 1872769. The next prime is 1872799. The reversal of 1872791 is 1972781.

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

It is a cyclic number.

It is not a de Polignac number, because 1872791 - 2⁶ = 1872727 is a prime.

It is a super-2 number, since 2×1872791² = 7014692259362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872799) 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, 32261 + ... + 32318.

It is an arithmetic number, because the mean of its divisors is an integer number (484350).

2^1872791 is an apocalyptic number.

1872791 is a deficient number, since it is larger than the sum of its proper divisors (64609).

1872791 is an equidigital number, since it uses as much as digits as its factorization.

1872791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64608.

The product of its digits is 7056, while the sum is 35.

The square root of 1872791 is about 1368.4995432955. The cubic root of 1872791 is about 123.2621592427.

The spelling of 1872791 in words is "one million, eight hundred seventy-two thousand, seven hundred ninety-one".