42015247 has 2 divisors, whose sum is σ = 42015248. Its totient is φ = 42015246.

The previous prime is 42015179. The next prime is 42015263. The reversal of 42015247 is 74251024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42015247 - 2²³ = 33626639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42015277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21007623 + 21007624.

It is an arithmetic number, because the mean of its divisors is an integer number (21007624).

Almost surely, 2^42015247 is an apocalyptic number.

42015247 is a deficient number, since it is larger than the sum of its proper divisors (1).

42015247 is an equidigital number, since it uses as much as digits as its factorization.

42015247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 42015247 is about 6481.9169232566. The cubic root of 42015247 is about 347.6447220809.

The spelling of 42015247 in words is "forty-two million, fifteen thousand, two hundred forty-seven".