451240 has 32 divisors (see below), whose sum is σ = 1053000. Its totient is φ = 173824.

The previous prime is 451207. The next prime is 451249. The reversal of 451240 is 42154.

It can be written as a sum of positive squares in 4 ways, for example, as 311364 + 139876 = 558^2 + 374^2 .

It is not an unprimeable number, because it can be changed into a prime (451249) 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, 966 + ... + 1354.

2⁴⁵¹²⁴⁰ is an apocalyptic number.

451240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526500).

451240 is an abundant number, since it is smaller than the sum of its proper divisors (601760).

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

451240 is a wasteful number, since it uses less digits than its factorization.

451240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 451240 is about 671.7439988567. The cubic root of 451240 is about 76.7012656269.

Adding to 451240 its reverse (42154), we get a palindrome (493394).

The spelling of 451240 in words is "four hundred fifty-one thousand, two hundred forty".