442446401 has 2 divisors, whose sum is σ = 442446402. Its totient is φ = 442446400.

The previous prime is 442446397. The next prime is 442446409. The reversal of 442446401 is 104644244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440958001 + 1488400 = 20999^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 442446401 - 2² = 442446397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (442446409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221223200 + 221223201.

It is an arithmetic number, because the mean of its divisors is an integer number (221223201).

Almost surely, 2^442446401 is an apocalyptic number.

It is an amenable number.

442446401 is a deficient number, since it is larger than the sum of its proper divisors (1).

442446401 is an equidigital number, since it uses as much as digits as its factorization.

442446401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 442446401 is about 21034.4099275449. The cubic root of 442446401 is about 761.9975159684.

The spelling of 442446401 in words is "four hundred forty-two million, four hundred forty-six thousand, four hundred one".