253280042 has 16 divisors (see below), whose sum is σ = 412081992. Its totient is φ = 116282880.

The previous prime is 253279993. The next prime is 253280047. The reversal of 253280042 is 240082352.

It can be written as a sum of positive squares in 4 ways, for example, as 169026001 + 84254041 = 13001^2 + 9179^2 .

It is a junction number, because it is equal to n+sod(n) for n = 253279993 and 253280020.

It is not an unprimeable number, because it can be changed into a prime (253280047) 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, 89453 + ... + 92240.

Almost surely, 2^253280042 is an apocalyptic number.

253280042 is a deficient number, since it is larger than the sum of its proper divisors (158801950).

253280042 is a wasteful number, since it uses less digits than its factorization.

253280042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181753.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 253280042 is about 15914.7743307909. The cubic root of 253280042 is about 632.7036256899.

The spelling of 253280042 in words is "two hundred fifty-three million, two hundred eighty thousand, forty-two".