46420921 has 4 divisors (see below), whose sum is σ = 46487844. Its totient is φ = 46354000.

The previous prime is 46420901. The next prime is 46420961. The reversal of 46420921 is 12902464.

46420921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38378025 + 8042896 = 6195^2 + 2836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-46420921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 46420921.

It is not an unprimeable number, because it can be changed into a prime (46420901) 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 3 ways as a sum of consecutive naturals, for example, 32410 + ... + 33811.

It is an arithmetic number, because the mean of its divisors is an integer number (11621961).

Almost surely, 2^46420921 is an apocalyptic number.

It is an amenable number.

46420921 is a deficient number, since it is larger than the sum of its proper divisors (66923).

46420921 is an equidigital number, since it uses as much as digits as its factorization.

46420921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66922.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 46420921 is about 6813.2900275858. The cubic root of 46420921 is about 359.3943546073.

The spelling of 46420921 in words is "forty-six million, four hundred twenty thousand, nine hundred twenty-one".