42450643 has 2 divisors, whose sum is σ = 42450644. Its totient is φ = 42450642.

The previous prime is 42450631. The next prime is 42450659. The reversal of 42450643 is 34605424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42450643 - 2²¹ = 40353491 is a prime.

It is a super-2 number, since 2×42450643² = 3604114182226898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42450143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21225321 + 21225322.

It is an arithmetic number, because the mean of its divisors is an integer number (21225322).

Almost surely, 2^42450643 is an apocalyptic number.

42450643 is a deficient number, since it is larger than the sum of its proper divisors (1).

42450643 is an equidigital number, since it uses as much as digits as its factorization.

42450643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 42450643 is about 6515.4157964016. The cubic root of 42450643 is about 348.8414563824.

The spelling of 42450643 in words is "forty-two million, four hundred fifty thousand, six hundred forty-three".