145374139 has 4 divisors (see below), whose sum is σ = 145764256. Its totient is φ = 144984024.

The previous prime is 145374137. The next prime is 145374143. The reversal of 145374139 is 931473541.

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

It is a cyclic number.

It is not a de Polignac number, because 145374139 - 2¹ = 145374137 is a prime.

It is a super-2 number, since 2×145374139² = 42267280579982642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145374098 and 145374107.

It is not an unprimeable number, because it can be changed into a prime (145374137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194499 + ... + 195244.

It is an arithmetic number, because the mean of its divisors is an integer number (36441064).

Almost surely, 2^145374139 is an apocalyptic number.

145374139 is a deficient number, since it is larger than the sum of its proper divisors (390117).

145374139 is an equidigital number, since it uses as much as digits as its factorization.

145374139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390116.

The product of its digits is 45360, while the sum is 37.

The square root of 145374139 is about 12057.1198467959. The cubic root of 145374139 is about 525.8102548272.

The spelling of 145374139 in words is "one hundred forty-five million, three hundred seventy-four thousand, one hundred thirty-nine".