145369139 has 4 divisors (see below), whose sum is σ = 145406520. Its totient is φ = 145331760.

The previous prime is 145369127. The next prime is 145369151. The reversal of 145369139 is 931963541.

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

It is an interprime number because it is at equal distance from previous prime (145369127) and next prime (145369151).

It is a cyclic number.

It is not a de Polignac number, because 145369139 - 2⁴ = 145369123 is a prime.

It is a super-2 number, since 2×145369139² = 42264373147202642, 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 = 145369096 and 145369105.

It is not an unprimeable number, because it can be changed into a prime (145369339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12077 + ... + 20894.

It is an arithmetic number, because the mean of its divisors is an integer number (36351630).

Almost surely, 2^145369139 is an apocalyptic number.

145369139 is a deficient number, since it is larger than the sum of its proper divisors (37381).

145369139 is an equidigital number, since it uses as much as digits as its factorization.

145369139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37380.

The product of its digits is 87480, while the sum is 41.

The square root of 145369139 is about 12056.9124986457. The cubic root of 145369139 is about 525.8042265166.

The spelling of 145369139 in words is "one hundred forty-five million, three hundred sixty-nine thousand, one hundred thirty-nine".