42384961 has 4 divisors (see below), whose sum is σ = 44878212. Its totient is φ = 39891712.

The previous prime is 42384959. The next prime is 42384983. The reversal of 42384961 is 16948324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26584336 + 15800625 = 5156^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 42384961 - 2¹ = 42384959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42384961.

It is not an unprimeable number, because it can be changed into a prime (42382961) 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, 1246600 + ... + 1246633.

It is an arithmetic number, because the mean of its divisors is an integer number (11219553).

Almost surely, 2^42384961 is an apocalyptic number.

It is an amenable number.

42384961 is a deficient number, since it is larger than the sum of its proper divisors (2493251).

42384961 is a wasteful number, since it uses less digits than its factorization.

42384961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493250.

The product of its digits is 41472, while the sum is 37.

The square root of 42384961 is about 6510.3733379892. The cubic root of 42384961 is about 348.6614478650.

It can be divided in two parts, 42 and 384961, that added together give a triangular number (385003 = T₈₇₇).

The spelling of 42384961 in words is "forty-two million, three hundred eighty-four thousand, nine hundred sixty-one".