145371999 has 8 divisors (see below), whose sum is σ = 195130800. Its totient is φ = 96263936.

The previous prime is 145371979. The next prime is 145372033. The reversal of 145371999 is 999173541.

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 145371999 - 2²⁰ = 144323423 is a prime.

It is a super-2 number, since 2×145371999² = 42266036186512002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145371959) 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, 162162 + ... + 163055.

It is an arithmetic number, because the mean of its divisors is an integer number (24391350).

Almost surely, 2^145371999 is an apocalyptic number.

145371999 is a deficient number, since it is larger than the sum of its proper divisors (49758801).

145371999 is a wasteful number, since it uses less digits than its factorization.

145371999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325369.

The product of its digits is 306180, while the sum is 48.

The square root of 145371999 is about 12057.0311022241. The cubic root of 145371999 is about 525.8076747272.

The spelling of 145371999 in words is "one hundred forty-five million, three hundred seventy-one thousand, nine hundred ninety-nine".