245474021 has 18 divisors (see below), whose sum is σ = 273444822. Its totient is φ = 220259520.

The previous prime is 245474003. The next prime is 245474023. The reversal of 245474021 is 120474542.

245474021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 9 ways, for example, as 14737921 + 230736100 = 3839^2 + 15190^2 .

It is not a de Polignac number, because 245474021 - 2²⁶ = 178365157 is a prime.

It is a super-3 number, since 3×245474021³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245474023) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 230831 + ... + 231891.

It is an arithmetic number, because the mean of its divisors is an integer number (15191379).

Almost surely, 2^245474021 is an apocalyptic number.

It is an amenable number.

245474021 is a deficient number, since it is larger than the sum of its proper divisors (27970801).

245474021 is a wasteful number, since it uses less digits than its factorization.

245474021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 245474021 is about 15667.6105708560. The cubic root of 245474021 is about 626.1357660598.

The spelling of 245474021 in words is "two hundred forty-five million, four hundred seventy-four thousand, twenty-one".