245115261 has 32 divisors (see below), whose sum is σ = 374371200. Its totient is φ = 158405760.

The previous prime is 245115259. The next prime is 245115289. The reversal of 245115261 is 162511542.

245115261 is a `hidden beast` number, since 2 + 451 + 152 + 61 = 666.

It is not a de Polignac number, because 245115261 - 2¹ = 245115259 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245115161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197535 + ... + 198771.

It is an arithmetic number, because the mean of its divisors is an integer number (11699100).

Almost surely, 2^245115261 is an apocalyptic number.

It is an amenable number.

245115261 is a deficient number, since it is larger than the sum of its proper divisors (129255939).

245115261 is a wasteful number, since it uses less digits than its factorization.

245115261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1460 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 245115261 is about 15656.1572871506. The cubic root of 245115261 is about 625.8305851031.

The spelling of 245115261 in words is "two hundred forty-five million, one hundred fifteen thousand, two hundred sixty-one".