245121039 has 16 divisors (see below), whose sum is σ = 368259840. Its totient is φ = 161111160.

The previous prime is 245121031. The next prime is 245121047. The reversal of 245121039 is 930121542.

It is an interprime number because it is at equal distance from previous prime (245121031) and next prime (245121047).

It is not a de Polignac number, because 245121039 - 2³ = 245121031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245121031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62017 + ... + 65850.

It is an arithmetic number, because the mean of its divisors is an integer number (23016240).

Almost surely, 2^245121039 is an apocalyptic number.

245121039 is a deficient number, since it is larger than the sum of its proper divisors (123138801).

245121039 is a wasteful number, since it uses less digits than its factorization.

245121039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127947 (or 127941 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 245121039 is about 15656.3418141020. The cubic root of 245121039 is about 625.8355025458.

The spelling of 245121039 in words is "two hundred forty-five million, one hundred twenty-one thousand, thirty-nine".