245281457 has 4 divisors (see below), whose sum is σ = 259709796. Its totient is φ = 230853120.

The previous prime is 245281451. The next prime is 245281471. The reversal of 245281457 is 754182542.

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

It can be written as a sum of positive squares in 2 ways, for example, as 157653136 + 87628321 = 12556^2 + 9361^2 .

It is a cyclic number.

It is not a de Polignac number, because 245281457 - 2⁴ = 245281441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245281457.

It is not an unprimeable number, because it can be changed into a prime (245281451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7214144 + ... + 7214177.

It is an arithmetic number, because the mean of its divisors is an integer number (64927449).

Almost surely, 2^245281457 is an apocalyptic number.

It is an amenable number.

245281457 is a deficient number, since it is larger than the sum of its proper divisors (14428339).

245281457 is a wasteful number, since it uses less digits than its factorization.

245281457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14428338.

The product of its digits is 89600, while the sum is 38.

The square root of 245281457 is about 15661.4640758775. The cubic root of 245281457 is about 625.9719975429.

The spelling of 245281457 in words is "two hundred forty-five million, two hundred eighty-one thousand, four hundred fifty-seven".