42402043 has 2 divisors, whose sum is σ = 42402044. Its totient is φ = 42402042.

The previous prime is 42402023. The next prime is 42402049. The reversal of 42402043 is 34020424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42402043 - 2⁹ = 42401531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42402043.

It is not a weakly prime, because it can be changed into another prime (42402049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21201021 + 21201022.

It is an arithmetic number, because the mean of its divisors is an integer number (21201022).

Almost surely, 2^42402043 is an apocalyptic number.

42402043 is a deficient number, since it is larger than the sum of its proper divisors (1).

42402043 is an equidigital number, since it uses as much as digits as its factorization.

42402043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 42402043 is about 6511.6851121657. The cubic root of 42402043 is about 348.7082807887.

Adding to 42402043 its reverse (34020424), we get a palindrome (76422467).

The spelling of 42402043 in words is "forty-two million, four hundred two thousand, forty-three".