254051721 has 135 divisors (see below), whose sum is σ = 507267453. Its totient is φ = 126236880.

The previous prime is 254051683. The next prime is 254051729. The reversal of 254051721 is 127150452.

The square root of 254051721 is 15939.

It is a perfect power (a square), and thus also a powerful number.

254051721 is a `hidden beast` number, since 2 + 540 + 51 + 72 + 1 = 666.

It is not a de Polignac number, because 254051721 - 2⁹ = 254051209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (254051729) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 11045716 + ... + 11045738.

Almost surely, 2^254051721 is an apocalyptic number.

254051721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

254051721 is the 15939-th square number.

254051721 is the 7970-th centered octagonal number.

It is an amenable number.

254051721 is a deficient number, since it is larger than the sum of its proper divisors (253215732).

254051721 is a wasteful number, since it uses less digits than its factorization.

254051721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The cubic root of 254051721 is about 633.3455358375.

The spelling of 254051721 in words is "two hundred fifty-four million, fifty-one thousand, seven hundred twenty-one".