253421001 has 32 divisors (see below), whose sum is σ = 393420800. Its totient is φ = 161021520.

The previous prime is 253420987. The next prime is 253421009. The reversal of 253421001 is 100124352.

It is not a de Polignac number, because 253421001 - 2⁷ = 253420873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253421009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53820 + ... + 58338.

It is an arithmetic number, because the mean of its divisors is an integer number (12294400).

Almost surely, 2^253421001 is an apocalyptic number.

It is an amenable number.

253421001 is a deficient number, since it is larger than the sum of its proper divisors (139999799).

253421001 is a wasteful number, since it uses less digits than its factorization.

253421001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626 (or 4620 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 253421001 is about 15919.2022727271. The cubic root of 253421001 is about 632.8209776532.

Adding to 253421001 its reverse (100124352), we get a palindrome (353545353).

The spelling of 253421001 in words is "two hundred fifty-three million, four hundred twenty-one thousand, one".