145904938 has 4 divisors (see below), whose sum is σ = 218857410. Its totient is φ = 72952468.

The previous prime is 145904921. The next prime is 145904951. The reversal of 145904938 is 839409541.

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., 111365809 + 34539129 = 10553^2 + 5877^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145904894 and 145904903.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36476233 + ... + 36476236.

Almost surely, 2^145904938 is an apocalyptic number.

145904938 is a deficient number, since it is larger than the sum of its proper divisors (72952472).

145904938 is an equidigital number, since it uses as much as digits as its factorization.

145904938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72952471.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 145904938 is about 12079.1116395205. Note that the first 3 decimals coincide. The cubic root of 145904938 is about 526.4494344371.

The spelling of 145904938 in words is "one hundred forty-five million, nine hundred four thousand, nine hundred thirty-eight".