253681274 has 64 divisors (see below), whose sum is σ = 503193600. Its totient is φ = 92923200.

The previous prime is 253681273. The next prime is 253681289. The reversal of 253681274 is 472186352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253681273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 529367 + ... + 529845.

It is an arithmetic number, because the mean of its divisors is an integer number (7862400).

Almost surely, 2^253681274 is an apocalyptic number.

253681274 is a deficient number, since it is larger than the sum of its proper divisors (249512326).

253681274 is a wasteful number, since it uses less digits than its factorization.

253681274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699.

The product of its digits is 80640, while the sum is 38.

The square root of 253681274 is about 15927.3749877373. The cubic root of 253681274 is about 633.0375472605.

The spelling of 253681274 in words is "two hundred fifty-three million, six hundred eighty-one thousand, two hundred seventy-four".