43742641 has 2 divisors, whose sum is σ = 43742642. Its totient is φ = 43742640.

The previous prime is 43742627. The next prime is 43742663. The reversal of 43742641 is 14624734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40056241 + 3686400 = 6329^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 43742641 - 2¹⁷ = 43611569 is a prime.

It is equal to p_2646733 and since 43742641 and 2646733 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (43743641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21871320 + 21871321.

It is an arithmetic number, because the mean of its divisors is an integer number (21871321).

Almost surely, 2^43742641 is an apocalyptic number.

It is an amenable number.

43742641 is a deficient number, since it is larger than the sum of its proper divisors (1).

43742641 is an equidigital number, since it uses as much as digits as its factorization.

43742641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 31.

The square root of 43742641 is about 6613.8219661554. The cubic root of 43742641 is about 352.3451788968.

The spelling of 43742641 in words is "forty-three million, seven hundred forty-two thousand, six hundred forty-one".