42042670 has 16 divisors (see below), whose sum is σ = 76014288. Its totient is φ = 16742080.

The previous prime is 42042659. The next prime is 42042673. The reversal of 42042670 is 7624024.

It is a super-2 number, since 2×42042670² = 3535172201457800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42042673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6991 + ... + 11530.

It is an arithmetic number, because the mean of its divisors is an integer number (4750893).

Almost surely, 2^42042670 is an apocalyptic number.

42042670 is a deficient number, since it is larger than the sum of its proper divisors (33971618).

42042670 is a wasteful number, since it uses less digits than its factorization.

42042670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18755.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 42042670 is about 6484.0319246592. The cubic root of 42042670 is about 347.7203405647.

Adding to 42042670 its reverse (7624024), we get a palindrome (49666694).

The spelling of 42042670 in words is "forty-two million, forty-two thousand, six hundred seventy".