245256421 has 8 divisors (see below), whose sum is σ = 249030720. Its totient is φ = 241493472.

The previous prime is 245256379. The next prime is 245256437. The reversal of 245256421 is 124652542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245256421 - 2¹³ = 245248229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245256721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47400 + ... + 52318.

It is an arithmetic number, because the mean of its divisors is an integer number (31128840).

Almost surely, 2^245256421 is an apocalyptic number.

It is an amenable number.

245256421 is a deficient number, since it is larger than the sum of its proper divisors (3774299).

245256421 is an equidigital number, since it uses as much as digits as its factorization.

245256421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675.

The product of its digits is 19200, while the sum is 31.

The square root of 245256421 is about 15660.6647687766. The cubic root of 245256421 is about 625.9506990608.

The spelling of 245256421 in words is "two hundred forty-five million, two hundred fifty-six thousand, four hundred twenty-one".