42450491 has 2 divisors, whose sum is σ = 42450492. Its totient is φ = 42450490.

The previous prime is 42450487. The next prime is 42450493. The reversal of 42450491 is 19405424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42450491 - 2² = 42450487 is a prime.

It is a super-2 number, since 2×42450491² = 3604088372282162, which contains 22 as substring.

Together with 42450493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42450493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21225245 + 21225246.

It is an arithmetic number, because the mean of its divisors is an integer number (21225246).

Almost surely, 2^42450491 is an apocalyptic number.

42450491 is a deficient number, since it is larger than the sum of its proper divisors (1).

42450491 is an equidigital number, since it uses as much as digits as its factorization.

42450491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 42450491 is about 6515.4041317481. The cubic root of 42450491 is about 348.8410400247.

The spelling of 42450491 in words is "forty-two million, four hundred fifty thousand, four hundred ninety-one".