42641973 has 18 divisors (see below), whose sum is σ = 67704182. Its totient is φ = 25842960.

The previous prime is 42641969. The next prime is 42641981. The reversal of 42641973 is 37914624.

42641973 is a `hidden beast` number, since 4 + 2 + 641 + 9 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40985604 + 1656369 = 6402^2 + 1287^2 .

It is not a de Polignac number, because 42641973 - 2² = 42641969 is a prime.

It is a super-2 number, since 2×42641973² = 3636675722665458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42641983) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18490 + ... + 20667.

Almost surely, 2^42641973 is an apocalyptic number.

It is an amenable number.

42641973 is a deficient number, since it is larger than the sum of its proper divisors (25062209).

42641973 is a wasteful number, since it uses less digits than its factorization.

42641973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39185 (or 39171 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 42641973 is about 6530.0821587481. The cubic root of 42641973 is about 349.3647606827.

The spelling of 42641973 in words is "forty-two million, six hundred forty-one thousand, nine hundred seventy-three".