42307661 has 32 divisors (see below), whose sum is σ = 51148800. Its totient is φ = 34577280.

The previous prime is 42307609. The next prime is 42307691. The reversal of 42307661 is 16670324.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42307661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42307691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 579521 + ... + 579593.

It is an arithmetic number, because the mean of its divisors is an integer number (1598400).

Almost surely, 2^42307661 is an apocalyptic number.

It is an amenable number.

42307661 is a deficient number, since it is larger than the sum of its proper divisors (8841139).

42307661 is a wasteful number, since it uses less digits than its factorization.

42307661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 42307661 is about 6504.4339492380. The cubic root of 42307661 is about 348.4493606036.

Adding to 42307661 its reverse (16670324), we get a palindrome (58977985).

It can be divided in two parts, 42 and 307661, that added together give a palindrome (307703).

The spelling of 42307661 in words is "forty-two million, three hundred seven thousand, six hundred sixty-one".