43742621 has 16 divisors (see below), whose sum is σ = 48722688. Its totient is φ = 39009600.

The previous prime is 43742557. The next prime is 43742627. The reversal of 43742621 is 12624734.

It is a cyclic number.

It is not a de Polignac number, because 43742621 - 2⁶ = 43742557 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 (43742627) 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, 101276 + ... + 101706.

It is an arithmetic number, because the mean of its divisors is an integer number (3045168).

Almost surely, 2^43742621 is an apocalyptic number.

It is an amenable number.

43742621 is a deficient number, since it is larger than the sum of its proper divisors (4980067).

43742621 is a wasteful number, since it uses less digits than its factorization.

43742621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692.

The product of its digits is 8064, while the sum is 29.

The square root of 43742621 is about 6613.8204541702. The cubic root of 43742621 is about 352.3451251971.

The spelling of 43742621 in words is "forty-three million, seven hundred forty-two thousand, six hundred twenty-one".