245364961 has 4 divisors (see below), whose sum is σ = 259798212. Its totient is φ = 230931712.

The previous prime is 245364949. The next prime is 245364967. The reversal of 245364961 is 169463542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169463542 = 2 ⋅84731771.

It can be written as a sum of positive squares in 2 ways, for example, as 154753600 + 90611361 = 12440^2 + 9519^2 .

It is a cyclic number.

It is not a de Polignac number, because 245364961 - 2⁵ = 245364929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245364967) 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, 7216600 + ... + 7216633.

It is an arithmetic number, because the mean of its divisors is an integer number (64949553).

Almost surely, 2^245364961 is an apocalyptic number.

It is an amenable number.

245364961 is a deficient number, since it is larger than the sum of its proper divisors (14433251).

245364961 is a wasteful number, since it uses less digits than its factorization.

245364961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14433250.

The product of its digits is 155520, while the sum is 40.

The square root of 245364961 is about 15664.1297555913. The cubic root of 245364961 is about 626.0430251095.

The spelling of 245364961 in words is "two hundred forty-five million, three hundred sixty-four thousand, nine hundred sixty-one".