442871461 has 2 divisors, whose sum is σ = 442871462. Its totient is φ = 442871460.

The previous prime is 442871423. The next prime is 442871467. The reversal of 442871461 is 164178244.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442050625 + 820836 = 21025^2 + 906^2 .

It is a cyclic number.

It is not a de Polignac number, because 442871461 - 2⁷ = 442871333 is a prime.

It is a super-2 number, since 2×442871461² = 392270261936549042, 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 442871461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442871467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221435730 + 221435731.

It is an arithmetic number, because the mean of its divisors is an integer number (221435731).

Almost surely, 2^442871461 is an apocalyptic number.

It is an amenable number.

442871461 is a deficient number, since it is larger than the sum of its proper divisors (1).

442871461 is an equidigital number, since it uses as much as digits as its factorization.

442871461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 37.

The square root of 442871461 is about 21044.5114222212. The cubic root of 442871461 is about 762.2414558720.

The spelling of 442871461 in words is "four hundred forty-two million, eight hundred seventy-one thousand, four hundred sixty-one".