253709426 has 4 divisors (see below), whose sum is σ = 380564142. Its totient is φ = 126854712.

The previous prime is 253709419. The next prime is 253709441. The reversal of 253709426 is 624907352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 252778201 + 931225 = 15899^2 + 965^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 253709426.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63427355 + ... + 63427358.

Almost surely, 2^253709426 is an apocalyptic number.

253709426 is a deficient number, since it is larger than the sum of its proper divisors (126854716).

253709426 is a wasteful number, since it uses less digits than its factorization.

253709426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126854715.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 253709426 is about 15928.2587246692. The cubic root of 253709426 is about 633.0609632758.

The spelling of 253709426 in words is "two hundred fifty-three million, seven hundred nine thousand, four hundred twenty-six".