442121951 has 2 divisors, whose sum is σ = 442121952. Its totient is φ = 442121950.

The previous prime is 442121929. The next prime is 442122013. The reversal of 442121951 is 159121244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442121951 - 2¹⁸ = 441859807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442121551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221060975 + 221060976.

It is an arithmetic number, because the mean of its divisors is an integer number (221060976).

Almost surely, 2^442121951 is an apocalyptic number.

442121951 is a deficient number, since it is larger than the sum of its proper divisors (1).

442121951 is an equidigital number, since it uses as much as digits as its factorization.

442121951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 442121951 is about 21026.6961503704. The cubic root of 442121951 is about 761.8112105009.

The spelling of 442121951 in words is "four hundred forty-two million, one hundred twenty-one thousand, nine hundred fifty-one".