42641642 has 4 divisors (see below), whose sum is σ = 63962466. Its totient is φ = 21320820.

The previous prime is 42641639. The next prime is 42641659. The reversal of 42641642 is 24614624.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32137561 + 10504081 = 5669^2 + 3241^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660409 + ... + 10660412.

Almost surely, 2^42641642 is an apocalyptic number.

42641642 is a deficient number, since it is larger than the sum of its proper divisors (21320824).

42641642 is a wasteful number, since it uses less digits than its factorization.

42641642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21320823.

The product of its digits is 9216, while the sum is 29.

The square root of 42641642 is about 6530.0568144542. The cubic root of 42641642 is about 349.3638567218.

The spelling of 42641642 in words is "forty-two million, six hundred forty-one thousand, six hundred forty-two".