145634 has 4 divisors (see below), whose sum is σ = 218454. Its totient is φ = 72816.

The previous prime is 145633. The next prime is 145637. The reversal of 145634 is 436541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 124609 + 21025 = 353^2 + 145^2 .

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

It is not an unprimeable number, because it can be changed into a prime (145633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36407 + ... + 36410.

2¹⁴⁵⁶³⁴ is an apocalyptic number.

145634 is a deficient number, since it is larger than the sum of its proper divisors (72820).

145634 is an equidigital number, since it uses as much as digits as its factorization.

145634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72819.

The product of its digits is 1440, while the sum is 23.

The square root of 145634 is about 381.6202300717. The cubic root of 145634 is about 52.6123369309.

The spelling of 145634 in words is "one hundred forty-five thousand, six hundred thirty-four".