2157746 has 4 divisors (see below), whose sum is σ = 3236622. Its totient is φ = 1078872.

The previous prime is 2157739. The next prime is 2157763. The reversal of 2157746 is 6477512.

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

It can be written as a sum of positive squares in only one way, i.e., 2070721 + 87025 = 1439^2 + 295^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539435 + ... + 539438.

2^2157746 is an apocalyptic number.

2157746 is a deficient number, since it is larger than the sum of its proper divisors (1078876).

2157746 is a wasteful number, since it uses less digits than its factorization.

2157746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078875.

The product of its digits is 11760, while the sum is 32.

The square root of 2157746 is about 1468.9268191438. The cubic root of 2157746 is about 129.2211019027.

The spelling of 2157746 in words is "two million, one hundred fifty-seven thousand, seven hundred forty-six".