2157436 has 12 divisors (see below), whose sum is σ = 3997728. Its totient is φ = 1015232.

The previous prime is 2157427. The next prime is 2157451. The reversal of 2157436 is 6347512.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 5³ + 7² + 4⁵ + 3¹⁰ + 6² .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15796 + ... + 15931.

It is an arithmetic number, because the mean of its divisors is an integer number (333144).

2^2157436 is an apocalyptic number.

It is an amenable number.

2157436 is a deficient number, since it is larger than the sum of its proper divisors (1840292).

2157436 is a wasteful number, since it uses less digits than its factorization.

2157436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31748 (or 31746 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 2157436 is about 1468.8212961419. The cubic root of 2157436 is about 129.2149132750.

The spelling of 2157436 in words is "two million, one hundred fifty-seven thousand, four hundred thirty-six".