42621541 has 16 divisors (see below), whose sum is σ = 46094400. Its totient is φ = 39287808.

The previous prime is 42621539. The next prime is 42621547. The reversal of 42621541 is 14512624.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42621541 - 2¹ = 42621539 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 (42621547) 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, 216255 + ... + 216451.

It is an arithmetic number, because the mean of its divisors is an integer number (2880900).

Almost surely, 2^42621541 is an apocalyptic number.

It is an amenable number.

42621541 is a deficient number, since it is larger than the sum of its proper divisors (3472859).

42621541 is a wasteful number, since it uses less digits than its factorization.

42621541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468.

The product of its digits is 1920, while the sum is 25.

The square root of 42621541 is about 6528.5175193148. The cubic root of 42621541 is about 349.3089521238.

The spelling of 42621541 in words is "forty-two million, six hundred twenty-one thousand, five hundred forty-one".