451052021 has 4 divisors (see below), whose sum is σ = 515488032. Its totient is φ = 386616012.

The previous prime is 451051999. The next prime is 451052023. The reversal of 451052021 is 120250154.

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 a de Polignac number, because none of the positive numbers 2^k-451052021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 451051984 and 451052002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451052023) 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, 32217995 + ... + 32218008.

It is an arithmetic number, because the mean of its divisors is an integer number (128872008).

Almost surely, 2^451052021 is an apocalyptic number.

It is an amenable number.

451052021 is a deficient number, since it is larger than the sum of its proper divisors (64436011).

451052021 is an equidigital number, since it uses as much as digits as its factorization.

451052021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64436010.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 451052021 is about 21237.9853328888. The cubic root of 451052021 is about 766.9061332819.

The spelling of 451052021 in words is "four hundred fifty-one million, fifty-two thousand, twenty-one".