451490 has 32 divisors (see below), whose sum is σ = 919296. Its totient is φ = 158400.

The previous prime is 451481. The next prime is 451499. The reversal of 451490 is 94154.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (451481) and next prime (451499).

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a nialpdrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 451490.

It is not an unprimeable number, because it can be changed into a prime (451499) by changing a digit.

451490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2915 + ... + 3065.

It is an arithmetic number, because the mean of its divisors is an integer number (28728).

2⁴⁵¹⁴⁹⁰ is an apocalyptic number.

451490 is an abundant number, since it is smaller than the sum of its proper divisors (467806).

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

451490 is a wasteful number, since it uses less digits than its factorization.

451490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 451490 is about 671.9300558838. The cubic root of 451490 is about 76.7154279177.

The spelling of 451490 in words is "four hundred fifty-one thousand, four hundred ninety".