245494761 has 4 divisors (see below), whose sum is σ = 327326352. Its totient is φ = 163663172.

The previous prime is 245494747. The next prime is 245494787. The reversal of 245494761 is 167494542.

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.

It is a cyclic number.

It is not a de Polignac number, because 245494761 - 2¹¹ = 245492713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245494721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40915791 + ... + 40915796.

It is an arithmetic number, because the mean of its divisors is an integer number (81831588).

Almost surely, 2^245494761 is an apocalyptic number.

It is an amenable number.

245494761 is a deficient number, since it is larger than the sum of its proper divisors (81831591).

245494761 is an equidigital number, since it uses as much as digits as its factorization.

245494761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81831590.

The product of its digits is 241920, while the sum is 42.

The square root of 245494761 is about 15668.2724318924. The cubic root of 245494761 is about 626.1533995485.

The spelling of 245494761 in words is "two hundred forty-five million, four hundred ninety-four thousand, seven hundred sixty-one".