42144661 has 16 divisors (see below), whose sum is σ = 46428480. Its totient is φ = 38021760.

The previous prime is 42144647. The next prime is 42144667. The reversal of 42144661 is 16644124.

It is a cyclic number.

It is not a de Polignac number, because 42144661 - 2⁵ = 42144629 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 (42144667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149841 + ... + 150121.

It is an arithmetic number, because the mean of its divisors is an integer number (2901780).

Almost surely, 2^42144661 is an apocalyptic number.

It is an amenable number.

42144661 is a deficient number, since it is larger than the sum of its proper divisors (4283819).

42144661 is a wasteful number, since it uses less digits than its factorization.

42144661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516.

The product of its digits is 4608, while the sum is 28.

The square root of 42144661 is about 6491.8919430317. The cubic root of 42144661 is about 348.0012908967.

Adding to 42144661 its reverse (16644124), we get a palindrome (58788785).

The spelling of 42144661 in words is "forty-two million, one hundred forty-four thousand, six hundred sixty-one".