145180391 has 8 divisors (see below), whose sum is σ = 154292544. Its totient is φ = 136131840.

The previous prime is 145180369. The next prime is 145180421. The reversal of 145180391 is 193081541.

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 145180391 - 2¹⁴ = 145164007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145180361) 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, 11150 + ... + 20363.

It is an arithmetic number, because the mean of its divisors is an integer number (19286568).

Almost surely, 2^145180391 is an apocalyptic number.

145180391 is a deficient number, since it is larger than the sum of its proper divisors (9112153).

145180391 is a wasteful number, since it uses less digits than its factorization.

145180391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31801.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 145180391 is about 12049.0825791842. The cubic root of 145180391 is about 525.5765590281.

The spelling of 145180391 in words is "one hundred forty-five million, one hundred eighty thousand, three hundred ninety-one".