245460781 has 2 divisors, whose sum is σ = 245460782. Its totient is φ = 245460780.

The previous prime is 245460769. The next prime is 245460799. The reversal of 245460781 is 187064542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212868100 + 32592681 = 14590^2 + 5709^2 .

It is a cyclic number.

It is not a de Polignac number, because 245460781 - 2⁷ = 245460653 is a prime.

It is a super-2 number, since 2×245460781² = 120501990018259922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 245460781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245460181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122730390 + 122730391.

It is an arithmetic number, because the mean of its divisors is an integer number (122730391).

Almost surely, 2^245460781 is an apocalyptic number.

It is an amenable number.

245460781 is a deficient number, since it is larger than the sum of its proper divisors (1).

245460781 is an equidigital number, since it uses as much as digits as its factorization.

245460781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 245460781 is about 15667.1880374239. The cubic root of 245460781 is about 626.1245086750.

The spelling of 245460781 in words is "two hundred forty-five million, four hundred sixty thousand, seven hundred eighty-one".