253461021 has 8 divisors (see below), whose sum is σ = 368670624. Its totient is φ = 153612720.

The previous prime is 253461017. The next prime is 253461023. The reversal of 253461021 is 120164352.

253461021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 253461021 - 2² = 253461017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253460982 and 253461000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253461023) 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, 3840286 + ... + 3840351.

It is an arithmetic number, because the mean of its divisors is an integer number (46083828).

Almost surely, 2^253461021 is an apocalyptic number.

It is an amenable number.

253461021 is a deficient number, since it is larger than the sum of its proper divisors (115209603).

253461021 is a wasteful number, since it uses less digits than its factorization.

253461021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7680651.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 253461021 is about 15920.4591956388. The cubic root of 253461021 is about 632.8542873926.

The spelling of 253461021 in words is "two hundred fifty-three million, four hundred sixty-one thousand, twenty-one".