145906 has 4 divisors (see below), whose sum is σ = 218862. Its totient is φ = 72952.

The previous prime is 145903. The next prime is 145931. The reversal of 145906 is 609541.

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., 126025 + 19881 = 355^2 + 141^2 .

It is not an unprimeable number, because it can be changed into a prime (145903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36475 + ... + 36478.

2¹⁴⁵⁹⁰⁶ is an apocalyptic number.

145906 is a deficient number, since it is larger than the sum of its proper divisors (72956).

145906 is an equidigital number, since it uses as much as digits as its factorization.

145906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72955.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 145906 is about 381.9764390640. The cubic root of 145906 is about 52.6450711725.

The spelling of 145906 in words is "one hundred forty-five thousand, nine hundred six".