451321240 has 16 divisors (see below), whose sum is σ = 1015472880. Its totient is φ = 180528480.

The previous prime is 451321223. The next prime is 451321261. The reversal of 451321240 is 42123154.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5641476 + ... + 5641555.

It is an arithmetic number, because the mean of its divisors is an integer number (63467055).

Almost surely, 2^451321240 is an apocalyptic number.

451321240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451321240 is an abundant number, since it is smaller than the sum of its proper divisors (564151640).

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

451321240 is a wasteful number, since it uses less digits than its factorization.

451321240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11283042 (or 11283038 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 451321240 is about 21244.3225356800. The cubic root of 451321240 is about 767.0586837850.

Adding to 451321240 its reverse (42123154), we get a palindrome (493444394).

The spelling of 451321240 in words is "four hundred fifty-one million, three hundred twenty-one thousand, two hundred forty".