253969245 has 24 divisors (see below), whose sum is σ = 442659672. Its totient is φ = 134697600.

The previous prime is 253969241. The next prime is 253969249. The reversal of 253969245 is 542969352.

It is an interprime number because it is at equal distance from previous prime (253969241) and next prime (253969249).

It can be written as a sum of positive squares in 4 ways, for example, as 27436644 + 226532601 = 5238^2 + 15051^2 .

It is not a de Polignac number, because 253969245 - 2² = 253969241 is a prime.

It is a super-3 number, since 3×253969245³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 253969245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253969241) 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, 7446 + ... + 23735.

It is an arithmetic number, because the mean of its divisors is an integer number (18444153).

Almost surely, 2^253969245 is an apocalyptic number.

It is an amenable number.

253969245 is a deficient number, since it is larger than the sum of its proper divisors (188690427).

253969245 is a wasteful number, since it uses less digits than its factorization.

253969245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31373 (or 31370 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 253969245 is about 15936.4125511358. The cubic root of 253969245 is about 633.2769914484.

The spelling of 253969245 in words is "two hundred fifty-three million, nine hundred sixty-nine thousand, two hundred forty-five".