145490 has 8 divisors (see below), whose sum is σ = 261900. Its totient is φ = 58192.

The previous prime is 145487. The next prime is 145501. The reversal of 145490 is 94541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 143641 + 1849 = 379^2 + 43^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7265 + ... + 7284.

2¹⁴⁵⁴⁹⁰ is an apocalyptic number.

145490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145490 is a deficient number, since it is larger than the sum of its proper divisors (116410).

145490 is a wasteful number, since it uses less digits than its factorization.

145490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14556.

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

The square root of 145490 is about 381.4315141674. The cubic root of 145490 is about 52.5949905353.

The spelling of 145490 in words is "one hundred forty-five thousand, four hundred ninety".