245987915 has 4 divisors (see below), whose sum is σ = 295185504. Its totient is φ = 196790328.

The previous prime is 245987891. The next prime is 245987939. The reversal of 245987915 is 519789542.

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

It is an interprime number because it is at equal distance from previous prime (245987891) and next prime (245987939).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245987915 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24598787 + ... + 24598796.

It is an arithmetic number, because the mean of its divisors is an integer number (73796376).

Almost surely, 2^245987915 is an apocalyptic number.

245987915 is a deficient number, since it is larger than the sum of its proper divisors (49197589).

245987915 is an equidigital number, since it uses as much as digits as its factorization.

245987915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49197588.

The product of its digits is 907200, while the sum is 50.

The square root of 245987915 is about 15684.0018808976. The cubic root of 245987915 is about 626.5723949346.

The spelling of 245987915 in words is "two hundred forty-five million, nine hundred eighty-seven thousand, nine hundred fifteen".