45729421 has 4 divisors (see below), whose sum is σ = 45791712. Its totient is φ = 45667132.

The previous prime is 45729403. The next prime is 45729461. The reversal of 45729421 is 12492754.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45729421 - 2¹¹ = 45727373 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 (45729401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30031 + ... + 31516.

It is an arithmetic number, because the mean of its divisors is an integer number (11447928).

Almost surely, 2^45729421 is an apocalyptic number.

It is an amenable number.

45729421 is a deficient number, since it is larger than the sum of its proper divisors (62291).

45729421 is an equidigital number, since it uses as much as digits as its factorization.

45729421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62290.

The product of its digits is 20160, while the sum is 34.

The square root of 45729421 is about 6762.3532146731. The cubic root of 45729421 is about 357.6008706836.

The spelling of 45729421 in words is "forty-five million, seven hundred twenty-nine thousand, four hundred twenty-one".