42107489 has 2 divisors, whose sum is σ = 42107490. Its totient is φ = 42107488.

The previous prime is 42107479. The next prime is 42107491. The reversal of 42107489 is 98470124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32547025 + 9560464 = 5705^2 + 3092^2 .

It is a cyclic number.

It is not a de Polignac number, because 42107489 - 2¹² = 42103393 is a prime.

Together with 42107491, 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 (42107479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21053744 + 21053745.

It is an arithmetic number, because the mean of its divisors is an integer number (21053745).

Almost surely, 2^42107489 is an apocalyptic number.

It is an amenable number.

42107489 is a deficient number, since it is larger than the sum of its proper divisors (1).

42107489 is an equidigital number, since it uses as much as digits as its factorization.

42107489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 42107489 is about 6489.0283556169. The cubic root of 42107489 is about 347.8989472962.

The spelling of 42107489 in words is "forty-two million, one hundred seven thousand, four hundred eighty-nine".