145254139 has 2 divisors, whose sum is σ = 145254140. Its totient is φ = 145254138.

The previous prime is 145254133. The next prime is 145254157. The reversal of 145254139 is 931452541.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145254139 is a prime.

It is not a weakly prime, because it can be changed into another prime (145254133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72627069 + 72627070.

It is an arithmetic number, because the mean of its divisors is an integer number (72627070).

Almost surely, 2^145254139 is an apocalyptic number.

145254139 is a deficient number, since it is larger than the sum of its proper divisors (1).

145254139 is an equidigital number, since it uses as much as digits as its factorization.

145254139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 145254139 is about 12052.1425066251. The cubic root of 145254139 is about 525.6655372034.

The spelling of 145254139 in words is "one hundred forty-five million, two hundred fifty-four thousand, one hundred thirty-nine".