253421705 has 16 divisors (see below), whose sum is σ = 318746880. Its totient is φ = 193055808.

The previous prime is 253421699. The next prime is 253421711. The reversal of 253421705 is 507124352.

It is a happy number.

253421705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (253421699) and next prime (253421711).

It is a cyclic number.

It is not a de Polignac number, because 253421705 - 2¹² = 253417609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21524 + ... + 31146.

It is an arithmetic number, because the mean of its divisors is an integer number (19921680).

Almost surely, 2^253421705 is an apocalyptic number.

It is an amenable number.

253421705 is a deficient number, since it is larger than the sum of its proper divisors (65325175).

253421705 is a wasteful number, since it uses less digits than its factorization.

253421705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9880.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 253421705 is about 15919.2243843725. The cubic root of 253421705 is about 632.8215636420.

The spelling of 253421705 in words is "two hundred fifty-three million, four hundred twenty-one thousand, seven hundred five".