245345761 has 4 divisors (see below), whose sum is σ = 256012992. Its totient is φ = 234678532.

The previous prime is 245345753. The next prime is 245345833. The reversal of 245345761 is 167543542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 167543542 = 2 ⋅83771771.

It is a cyclic number.

It is not a de Polignac number, because 245345761 - 2³ = 245345753 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 245345761.

It is not an unprimeable number, because it can be changed into a prime (245345701) 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, 5333581 + ... + 5333626.

It is an arithmetic number, because the mean of its divisors is an integer number (64003248).

Almost surely, 2^245345761 is an apocalyptic number.

It is an amenable number.

245345761 is a deficient number, since it is larger than the sum of its proper divisors (10667231).

245345761 is a wasteful number, since it uses less digits than its factorization.

245345761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10667230.

The product of its digits is 100800, while the sum is 37.

The square root of 245345761 is about 15663.5168784025. The cubic root of 245345761 is about 626.0266952315.

The spelling of 245345761 in words is "two hundred forty-five million, three hundred forty-five thousand, seven hundred sixty-one".