451025021 has 8 divisors (see below), whose sum is σ = 475642080. Its totient is φ = 426495888.

The previous prime is 451024991. The next prime is 451025053. The reversal of 451025021 is 120520154.

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

It is not a de Polignac number, because 451025021 - 2²² = 446830717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 451024984 and 451025002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451025621) 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, 11306 + ... + 32091.

It is an arithmetic number, because the mean of its divisors is an integer number (59455260).

Almost surely, 2^451025021 is an apocalyptic number.

It is an amenable number.

451025021 is a deficient number, since it is larger than the sum of its proper divisors (24617059).

451025021 is a wasteful number, since it uses less digits than its factorization.

451025021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43963.

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

The square root of 451025021 is about 21237.3496698623. The cubic root of 451025021 is about 766.8908306281.

Adding to 451025021 its reverse (120520154), we get a palindrome (571545175).

The spelling of 451025021 in words is "four hundred fifty-one million, twenty-five thousand, twenty-one".