42507511 has 2 divisors, whose sum is σ = 42507512. Its totient is φ = 42507510.

The previous prime is 42507469. The next prime is 42507523. The reversal of 42507511 is 11570524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42507511 - 2⁷ = 42507383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42507551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21253755 + 21253756.

It is an arithmetic number, because the mean of its divisors is an integer number (21253756).

Almost surely, 2^42507511 is an apocalyptic number.

42507511 is a deficient number, since it is larger than the sum of its proper divisors (1).

42507511 is an equidigital number, since it uses as much as digits as its factorization.

42507511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 42507511 is about 6519.7784471560. The cubic root of 42507511 is about 348.9971592777.

The spelling of 42507511 in words is "forty-two million, five hundred seven thousand, five hundred eleven".