42195451 has 2 divisors, whose sum is σ = 42195452. Its totient is φ = 42195450.

The previous prime is 42195449. The next prime is 42195467. The reversal of 42195451 is 15459124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42195451 - 2¹ = 42195449 is a prime.

Together with 42195449, 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 (42195431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21097725 + 21097726.

It is an arithmetic number, because the mean of its divisors is an integer number (21097726).

Almost surely, 2^42195451 is an apocalyptic number.

42195451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42195451 is an equidigital number, since it uses as much as digits as its factorization.

42195451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 42195451 is about 6495.8025678125. The cubic root of 42195451 is about 348.1410309385.

The spelling of 42195451 in words is "forty-two million, one hundred ninety-five thousand, four hundred fifty-one".