45257621 has 8 divisors (see below), whose sum is σ = 47991384. Its totient is φ = 42531840.

The previous prime is 45257617. The next prime is 45257647. The reversal of 45257621 is 12675254.

45257621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 555025 + 44702596 = 745^2 + 6686^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 45257621 - 2² = 45257617 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 (45257651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12941 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (5998923).

Almost surely, 2^45257621 is an apocalyptic number.

It is an amenable number.

45257621 is a deficient number, since it is larger than the sum of its proper divisors (2733763).

45257621 is a wasteful number, since it uses less digits than its factorization.

45257621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991.

The product of its digits is 16800, while the sum is 32.

The square root of 45257621 is about 6727.3784641567. The cubic root of 45257621 is about 356.3668025332.

The spelling of 45257621 in words is "forty-five million, two hundred fifty-seven thousand, six hundred twenty-one".