45742321 has 2 divisors, whose sum is σ = 45742322. Its totient is φ = 45742320.

The previous prime is 45742313. The next prime is 45742337. The reversal of 45742321 is 12324754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45427600 + 314721 = 6740^2 + 561^2 .

It is a cyclic number.

It is not a de Polignac number, because 45742321 - 2³ = 45742313 is a prime.

It is equal to p_2760445 and since 45742321 and 2760445 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45742321.

It is not a weakly prime, because it can be changed into another prime (45742381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22871160 + 22871161.

It is an arithmetic number, because the mean of its divisors is an integer number (22871161).

Almost surely, 2^45742321 is an apocalyptic number.

It is an amenable number.

45742321 is a deficient number, since it is larger than the sum of its proper divisors (1).

45742321 is an equidigital number, since it uses as much as digits as its factorization.

45742321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 45742321 is about 6763.3069573989. The cubic root of 45742321 is about 357.6344932211.

It can be divided in two parts, 457 and 42321, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 45742321 in words is "forty-five million, seven hundred forty-two thousand, three hundred twenty-one".