145151999 has 8 divisors (see below), whose sum is σ = 149326320. Its totient is φ = 140990976.

The previous prime is 145151987. The next prime is 145152023. The reversal of 145151999 is 999151541.

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 145151999 - 2²⁰ = 144103423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145151939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21407 + ... + 27359.

It is an arithmetic number, because the mean of its divisors is an integer number (18665790).

Almost surely, 2^145151999 is an apocalyptic number.

145151999 is a deficient number, since it is larger than the sum of its proper divisors (4174321).

145151999 is an equidigital number, since it uses as much as digits as its factorization.

145151999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6649.

The product of its digits is 72900, while the sum is 44.

The square root of 145151999 is about 12047.9043405897. The cubic root of 145151999 is about 525.5422955797.

The spelling of 145151999 in words is "one hundred forty-five million, one hundred fifty-one thousand, nine hundred ninety-nine".