145253139 has 8 divisors (see below), whose sum is σ = 196846032. Its totient is φ = 95247840.

The previous prime is 145253131. The next prime is 145253153. The reversal of 145253139 is 931352541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145253139 - 2³ = 145253131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145253131) 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 7 ways as a sum of consecutive naturals, for example, 396684 + ... + 397049.

It is an arithmetic number, because the mean of its divisors is an integer number (24605754).

Almost surely, 2^145253139 is an apocalyptic number.

145253139 is a deficient number, since it is larger than the sum of its proper divisors (51592893).

145253139 is an equidigital number, since it uses as much as digits as its factorization.

145253139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793797.

The product of its digits is 16200, while the sum is 33.

The square root of 145253139 is about 12052.1010201541. The cubic root of 145253139 is about 525.6643308884.

The spelling of 145253139 in words is "one hundred forty-five million, two hundred fifty-three thousand, one hundred thirty-nine".