451212420 has 24 divisors (see below), whose sum is σ = 1263394944. Its totient is φ = 120323296.

The previous prime is 451212403. The next prime is 451212427. The reversal of 451212420 is 24212154.

It is a super-3 number, since 3×451212420³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (451212427) 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, 3760044 + ... + 3760163.

It is an arithmetic number, because the mean of its divisors is an integer number (52641456).

Almost surely, 2^451212420 is an apocalyptic number.

It is an amenable number.

451212420 is an abundant number, since it is smaller than the sum of its proper divisors (812182524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451212420 is a wasteful number, since it uses less digits than its factorization.

451212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7520219 (or 7520217 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 451212420 is about 21241.7612264143. The cubic root of 451212420 is about 766.9970292264.

Adding to 451212420 its reverse (24212154), we get a palindrome (475424574).

The spelling of 451212420 in words is "four hundred fifty-one million, two hundred twelve thousand, four hundred twenty".