145858 has 8 divisors (see below), whose sum is σ = 220428. Its totient is φ = 72384.

The previous prime is 145829. The next prime is 145861. The reversal of 145858 is 858541.

It can be written as a sum of positive squares in 2 ways, for example, as 110889 + 34969 = 333^2 + 187^2 .

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

It is an Ulam number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310 + ... + 622.

2¹⁴⁵⁸⁵⁸ is an apocalyptic number.

145858 is a deficient number, since it is larger than the sum of its proper divisors (74570).

145858 is a wasteful number, since it uses less digits than its factorization.

145858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548.

The product of its digits is 6400, while the sum is 31.

The square root of 145858 is about 381.9136027952. The cubic root of 145858 is about 52.6392974996.

The spelling of 145858 in words is "one hundred forty-five thousand, eight hundred fifty-eight".