2157701 has 16 divisors (see below), whose sum is σ = 2690688. Its totient is φ = 1684800.

The previous prime is 2157679. The next prime is 2157709. The reversal of 2157701 is 1077512.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2157701 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11831 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (168168).

2^2157701 is an apocalyptic number.

It is an amenable number.

2157701 is a deficient number, since it is larger than the sum of its proper divisors (532987).

2157701 is a wasteful number, since it uses less digits than its factorization.

2157701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 2157701 is about 1468.9115017590. The cubic root of 2157701 is about 129.2202035903.

The spelling of 2157701 in words is "two million, one hundred fifty-seven thousand, seven hundred one".