42849451 has 2 divisors, whose sum is σ = 42849452. Its totient is φ = 42849450.

The previous prime is 42849413. The next prime is 42849463. The reversal of 42849451 is 15494824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42849451 - 2¹³ = 42841259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42849451.

It is not a weakly prime, because it can be changed into another prime (42849151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21424725 + 21424726.

It is an arithmetic number, because the mean of its divisors is an integer number (21424726).

Almost surely, 2^42849451 is an apocalyptic number.

42849451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42849451 is an equidigital number, since it uses as much as digits as its factorization.

42849451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 37.

The square root of 42849451 is about 6545.9492054247. The cubic root of 42849451 is about 349.9304650979.

The spelling of 42849451 in words is "forty-two million, eight hundred forty-nine thousand, four hundred fifty-one".