145213239 has 8 divisors (see below), whose sum is σ = 193677552. Its totient is φ = 96778880.

The previous prime is 145213199. The next prime is 145213291. The reversal of 145213239 is 932312541.

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

It is a cyclic number.

It is not a de Polignac number, because 145213239 - 2⁷ = 145213111 is a prime.

It is a super-2 number, since 2×145213239² = 42173769561742242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145213639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9037 + ... + 19289.

It is an arithmetic number, because the mean of its divisors is an integer number (24209694).

Almost surely, 2^145213239 is an apocalyptic number.

145213239 is a deficient number, since it is larger than the sum of its proper divisors (48464313).

145213239 is a wasteful number, since it uses less digits than its factorization.

145213239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14977.

The product of its digits is 6480, while the sum is 30.

The square root of 145213239 is about 12050.4455934210. The cubic root of 145213239 is about 525.6161944013.

The spelling of 145213239 in words is "one hundred forty-five million, two hundred thirteen thousand, two hundred thirty-nine".