42319961 has 6 divisors (see below), whose sum is σ = 43830462. Its totient is φ = 40859840.

The previous prime is 42319951. The next prime is 42319993. The reversal of 42319961 is 16991324.

It can be written as a sum of positive squares in 3 ways, for example, as 10465225 + 31854736 = 3235^2 + 5644^2 .

It is not a de Polignac number, because 42319961 - 2¹⁸ = 42057817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42319951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24320 + ... + 26001.

It is an arithmetic number, because the mean of its divisors is an integer number (7305077).

Almost surely, 2^42319961 is an apocalyptic number.

It is an amenable number.

42319961 is a deficient number, since it is larger than the sum of its proper divisors (1510501).

42319961 is an equidigital number, since it uses as much as digits as its factorization.

42319961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50379 (or 50350 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 42319961 is about 6505.3793893977. The cubic root of 42319961 is about 348.4831252675.

The spelling of 42319961 in words is "forty-two million, three hundred nineteen thousand, nine hundred sixty-one".