45420661 has 32 divisors (see below), whose sum is σ = 55996416. Its totient is φ = 36288000.

The previous prime is 45420647. The next prime is 45420679. The reversal of 45420661 is 16602454.

It is a cyclic number.

It is not a de Polignac number, because 45420661 - 2⁹ = 45420149 is a prime.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45420601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357580 + ... + 357706.

It is an arithmetic number, because the mean of its divisors is an integer number (1749888).

Almost surely, 2^45420661 is an apocalyptic number.

45420661 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

45420661 is a deficient number, since it is larger than the sum of its proper divisors (10575755).

45420661 is a wasteful number, since it uses less digits than its factorization.

45420661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 45420661 is about 6739.4852177299. The cubic root of 45420661 is about 356.7942252956.

It can be divided in two parts, 454 and 20661, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 45420661 in words is "forty-five million, four hundred twenty thousand, six hundred sixty-one".