42461661 has 16 divisors (see below), whose sum is σ = 63756288. Its totient is φ = 24903600.

The previous prime is 42461659. The next prime is 42461669. The reversal of 42461661 is 16616424.

It is not a de Polignac number, because 42461661 - 2¹ = 42461659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42461669) 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, 19731 + ... + 21776.

It is an arithmetic number, because the mean of its divisors is an integer number (3984768).

Almost surely, 2^42461661 is an apocalyptic number.

It is an amenable number.

42461661 is a deficient number, since it is larger than the sum of its proper divisors (21294627).

42461661 is a wasteful number, since it uses less digits than its factorization.

42461661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41552.

The product of its digits is 6912, while the sum is 30.

The square root of 42461661 is about 6516.2612746881. The cubic root of 42461661 is about 348.8716341953.

The spelling of 42461661 in words is "forty-two million, four hundred sixty-one thousand, six hundred sixty-one".