2157430 has 24 divisors (see below), whose sum is σ = 4270896. Its totient is φ = 784080.

The previous prime is 2157427. The next prime is 2157451. The reversal of 2157430 is 347512.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319 + ... + 2101.

It is an arithmetic number, because the mean of its divisors is an integer number (177954).

2^2157430 is an apocalyptic number.

2157430 is a deficient number, since it is larger than the sum of its proper divisors (2113466).

2157430 is a wasteful number, since it uses less digits than its factorization.

2157430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812 (or 1801 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2157430 is about 1468.8192536864. The cubic root of 2157430 is about 129.2147934893.

The spelling of 2157430 in words is "two million, one hundred fifty-seven thousand, four hundred thirty".