42319261 has 2 divisors, whose sum is σ = 42319262. Its totient is φ = 42319260.

The previous prime is 42319243. The next prime is 42319283. The reversal of 42319261 is 16291324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37884025 + 4435236 = 6155^2 + 2106^2 .

It is a cyclic number.

It is not a de Polignac number, because 42319261 - 2¹¹ = 42317213 is a prime.

It is a super-2 number, since 2×42319261² = 3581839703172242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42319561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21159630 + 21159631.

It is an arithmetic number, because the mean of its divisors is an integer number (21159631).

Almost surely, 2^42319261 is an apocalyptic number.

It is an amenable number.

42319261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42319261 is an equidigital number, since it uses as much as digits as its factorization.

42319261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 42319261 is about 6505.3255875475. The cubic root of 42319261 is about 348.4812038768.

The spelling of 42319261 in words is "forty-two million, three hundred nineteen thousand, two hundred sixty-one".