45123621 has 8 divisors (see below), whose sum is σ = 60238464. Its totient is φ = 30045600.

The previous prime is 45123599. The next prime is 45123643. The reversal of 45123621 is 12632154.

It is an interprime number because it is at equal distance from previous prime (45123599) and next prime (45123643).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45123621 - 2⁶ = 45123557 is a prime.

It is a super-2 number, since 2×45123621² = 4072282344303282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45123591 and 45123600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45123691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6205 + ... + 11346.

It is an arithmetic number, because the mean of its divisors is an integer number (7529808).

Almost surely, 2^45123621 is an apocalyptic number.

It is an amenable number.

45123621 is a deficient number, since it is larger than the sum of its proper divisors (15114843).

45123621 is a wasteful number, since it uses less digits than its factorization.

45123621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18411.

The product of its digits is 1440, while the sum is 24.

The square root of 45123621 is about 6717.4117783563. The cubic root of 45123621 is about 356.0147413203.

Adding to 45123621 its reverse (12632154), we get a palindrome (57755775).

The spelling of 45123621 in words is "forty-five million, one hundred twenty-three thousand, six hundred twenty-one".