145001938 has 4 divisors (see below), whose sum is σ = 217502910. Its totient is φ = 72500968.

The previous prime is 145001921. The next prime is 145001957. The reversal of 145001938 is 839100541.

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., 144793089 + 208849 = 12033^2 + 457^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36250483 + ... + 36250486.

Almost surely, 2^145001938 is an apocalyptic number.

145001938 is a deficient number, since it is larger than the sum of its proper divisors (72500972).

145001938 is an equidigital number, since it uses as much as digits as its factorization.

145001938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72500971.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 145001938 is about 12041.6750495934. The cubic root of 145001938 is about 525.3611278028.

The spelling of 145001938 in words is "one hundred forty-five million, one thousand, nine hundred thirty-eight".