253041021 has 24 divisors (see below), whose sum is σ = 372721440. Its totient is φ = 165394656.

The previous prime is 253041017. The next prime is 253041043. The reversal of 253041021 is 120140352.

253041021 is a `hidden beast` number, since 253 + 0 + 410 + 2 + 1 = 666.

It is not a de Polignac number, because 253041021 - 2² = 253041017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253040985 and 253041003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253049021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102615 + ... + 105051.

It is an arithmetic number, because the mean of its divisors is an integer number (15530060).

Almost surely, 2^253041021 is an apocalyptic number.

It is an amenable number.

253041021 is a deficient number, since it is larger than the sum of its proper divisors (119680419).

253041021 is a wasteful number, since it uses less digits than its factorization.

253041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665 (or 2662 counting only the distinct ones).

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

The square root of 253041021 is about 15907.2631524093. The cubic root of 253041021 is about 632.5045350589.

Adding to 253041021 its reverse (120140352), we get a palindrome (373181373).

The spelling of 253041021 in words is "two hundred fifty-three million, forty-one thousand, twenty-one".