254721251 has 8 divisors (see below), whose sum is σ = 281431584. Its totient is φ = 229313920.

The previous prime is 254721199. The next prime is 254721281. The reversal of 254721251 is 152127452.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254721251 is a prime.

It is a super-2 number, since 2×254721251² = 129765831422010002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254721281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325340 + ... + 326121.

It is an arithmetic number, because the mean of its divisors is an integer number (35178948).

Almost surely, 2^254721251 is an apocalyptic number.

254721251 is a deficient number, since it is larger than the sum of its proper divisors (26710333).

254721251 is a wasteful number, since it uses less digits than its factorization.

254721251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651501.

The product of its digits is 5600, while the sum is 29.

The square root of 254721251 is about 15959.9890664123. The cubic root of 254721251 is about 633.9014224759.

The spelling of 254721251 in words is "two hundred fifty-four million, seven hundred twenty-one thousand, two hundred fifty-one".