42661319 has 4 divisors (see below), whose sum is σ = 42916944. Its totient is φ = 42405696.

The previous prime is 42661277. The next prime is 42661331. The reversal of 42661319 is 91316624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42661319 - 2⁸ = 42661063 is a prime.

It is a super-2 number, since 2×42661319² = 3639976277639522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42661369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127562 + ... + 127895.

It is an arithmetic number, because the mean of its divisors is an integer number (10729236).

Almost surely, 2^42661319 is an apocalyptic number.

42661319 is a deficient number, since it is larger than the sum of its proper divisors (255625).

42661319 is a wasteful number, since it uses less digits than its factorization.

42661319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255624.

The product of its digits is 7776, while the sum is 32.

The square root of 42661319 is about 6531.5632891368. The cubic root of 42661319 is about 349.4175864810.

The spelling of 42661319 in words is "forty-two million, six hundred sixty-one thousand, three hundred nineteen".