42505497 has 24 divisors (see below), whose sum is σ = 62604360. Its totient is φ = 27786240.

The previous prime is 42505469. The next prime is 42505501. The reversal of 42505497 is 79450524.

It can be written as a sum of positive squares in 4 ways, for example, as 2322576 + 40182921 = 1524^2 + 6339^2 .

It is not a de Polignac number, because 42505497 - 2⁷ = 42505369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42505427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157879 + ... + 158147.

It is an arithmetic number, because the mean of its divisors is an integer number (2608515).

Almost surely, 2^42505497 is an apocalyptic number.

It is an amenable number.

42505497 is a deficient number, since it is larger than the sum of its proper divisors (20098863).

42505497 is a wasteful number, since it uses less digits than its factorization.

42505497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 42505497 is about 6519.6239922253. The cubic root of 42505497 is about 348.9916473783.

The spelling of 42505497 in words is "forty-two million, five hundred five thousand, four hundred ninety-seven".