145991415 has 16 divisors (see below), whose sum is σ = 237994848. Its totient is φ = 76392576.

The previous prime is 145991401. The next prime is 145991437. The reversal of 145991415 is 514199541.

It is not a de Polignac number, because 145991415 - 2⁹ = 145990903 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91024 + ... + 92613.

It is an arithmetic number, because the mean of its divisors is an integer number (14874678).

Almost surely, 2^145991415 is an apocalyptic number.

145991415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145991415 is a deficient number, since it is larger than the sum of its proper divisors (92003433).

145991415 is a wasteful number, since it uses less digits than its factorization.

145991415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183698.

The product of its digits is 32400, while the sum is 39.

The square root of 145991415 is about 12082.6907185444. The cubic root of 145991415 is about 526.5534217250.

The spelling of 145991415 in words is "one hundred forty-five million, nine hundred ninety-one thousand, four hundred fifteen".