42690505 has 16 divisors (see below), whose sum is σ = 60185664. Its totient is φ = 28658880.

The previous prime is 42690481. The next prime is 42690509. The reversal of 42690505 is 50509624.

It is not a de Polignac number, because 42690505 - 2⁹ = 42689993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42690509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29139 + ... + 30568.

It is an arithmetic number, because the mean of its divisors is an integer number (3761604).

Almost surely, 2^42690505 is an apocalyptic number.

It is an amenable number.

42690505 is a deficient number, since it is larger than the sum of its proper divisors (17495159).

42690505 is a wasteful number, since it uses less digits than its factorization.

42690505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59736.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 42690505 is about 6533.7971348979. The cubic root of 42690505 is about 349.4972509732.

The spelling of 42690505 in words is "forty-two million, six hundred ninety thousand, five hundred five".