2131725 has 24 divisors (see below), whose sum is σ = 3611872. Its totient is φ = 1108800.

The previous prime is 2131721. The next prime is 2131771. The reversal of 2131725 is 5271312.

It is not a de Polignac number, because 2131725 - 2² = 2131721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2895 + ... + 3555.

2^2131725 is an apocalyptic number.

2131725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2131725 is a deficient number, since it is larger than the sum of its proper divisors (1480147).

2131725 is a wasteful number, since it uses less digits than its factorization.

2131725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 712 counting only the distinct ones).

The product of its digits is 420, while the sum is 21.

The square root of 2131725 is about 1460.0428075916. The cubic root of 2131725 is about 128.6995592151.

The spelling of 2131725 in words is "two million, one hundred thirty-one thousand, seven hundred twenty-five".