42490871461 has 2 divisors, whose sum is σ = 42490871462. Its totient is φ = 42490871460.

The previous prime is 42490871441. The next prime is 42490871567. The reversal of 42490871461 is 16417809424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28251222561 + 14239648900 = 168081^2 + 119330^2 .

It is a cyclic number.

It is not a de Polignac number, because 42490871461 - 2⁵ = 42490871429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42490871431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21245435730 + 21245435731.

It is an arithmetic number, because the mean of its divisors is an integer number (21245435731).

Almost surely, 2^42490871461 is an apocalyptic number.

It is an amenable number.

42490871461 is a deficient number, since it is larger than the sum of its proper divisors (1).

42490871461 is an equidigital number, since it uses as much as digits as its factorization.

42490871461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 42490871461 in words is "forty-two billion, four hundred ninety million, eight hundred seventy-one thousand, four hundred sixty-one".