251672 has 16 divisors (see below), whose sum is σ = 477240. Its totient is φ = 124416.

The previous prime is 251663. The next prime is 251677. The reversal of 251672 is 276152.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 251672.

It is not an unprimeable number, because it can be changed into a prime (251677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208 + ... + 1400.

2²⁵¹⁶⁷² is an apocalyptic number.

It is an amenable number.

251672 is a deficient number, since it is larger than the sum of its proper divisors (225568).

251672 is a wasteful number, since it uses less digits than its factorization.

251672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 358 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 251672 is about 501.6692137255. The cubic root of 251672 is about 63.1361797668.

Adding to 251672 its sum of digits (23), we get a triangular number (251695 = T₇₀₉).

The spelling of 251672 in words is "two hundred fifty-one thousand, six hundred seventy-two".