253871421 has 8 divisors (see below), whose sum is σ = 358406784. Its totient is φ = 159291840.

The previous prime is 253871411. The next prime is 253871459. The reversal of 253871421 is 124178352.

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

It is not a de Polignac number, because 253871421 - 2⁵ = 253871389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253871411) 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, 2488885 + ... + 2488986.

It is an arithmetic number, because the mean of its divisors is an integer number (44800848).

Almost surely, 2^253871421 is an apocalyptic number.

It is an amenable number.

253871421 is a deficient number, since it is larger than the sum of its proper divisors (104535363).

253871421 is a wasteful number, since it uses less digits than its factorization.

253871421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4977891.

The product of its digits is 13440, while the sum is 33.

The square root of 253871421 is about 15933.3430578771. The cubic root of 253871421 is about 633.1956723579.

The spelling of 253871421 in words is "two hundred fifty-three million, eight hundred seventy-one thousand, four hundred twenty-one".