253605465 has 16 divisors (see below), whose sum is σ = 450854400. Its totient is φ = 135256176.

The previous prime is 253605463. The next prime is 253605503. The reversal of 253605465 is 564506352.

It is a happy number.

253605465 is a `hidden beast` number, since 2 + 5 + 3 + 605 + 46 + 5 = 666.

It is not a de Polignac number, because 253605465 - 2¹ = 253605463 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253605461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939145 + ... + 939414.

It is an arithmetic number, because the mean of its divisors is an integer number (28178400).

Almost surely, 2^253605465 is an apocalyptic number.

It is an amenable number.

253605465 is a deficient number, since it is larger than the sum of its proper divisors (197248935).

253605465 is a wasteful number, since it uses less digits than its factorization.

253605465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878573 (or 1878567 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 253605465 is about 15924.9949764513. The cubic root of 253605465 is about 632.9744829228.

The spelling of 253605465 in words is "two hundred fifty-three million, six hundred five thousand, four hundred sixty-five".