42983561 has 4 divisors (see below), whose sum is σ = 43011072. Its totient is φ = 42956052.

The previous prime is 42983543. The next prime is 42983593. The reversal of 42983561 is 16538924.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42983561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42983261) 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, 11261 + ... + 14586.

It is an arithmetic number, because the mean of its divisors is an integer number (10752768).

Almost surely, 2^42983561 is an apocalyptic number.

It is an amenable number.

42983561 is a deficient number, since it is larger than the sum of its proper divisors (27511).

42983561 is a wasteful number, since it uses less digits than its factorization.

42983561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27510.

The product of its digits is 51840, while the sum is 38.

The square root of 42983561 is about 6556.1849424799. The cubic root of 42983561 is about 350.2951551073.

The spelling of 42983561 in words is "forty-two million, nine hundred eighty-three thousand, five hundred sixty-one".