145739515 has 4 divisors (see below), whose sum is σ = 174887424. Its totient is φ = 116591608.

The previous prime is 145739483. The next prime is 145739537. The reversal of 145739515 is 515937541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145739515 - 2⁵ = 145739483 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14573947 + ... + 14573956.

It is an arithmetic number, because the mean of its divisors is an integer number (43721856).

Almost surely, 2^145739515 is an apocalyptic number.

145739515 is a deficient number, since it is larger than the sum of its proper divisors (29147909).

145739515 is an equidigital number, since it uses as much as digits as its factorization.

145739515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29147908.

The product of its digits is 94500, while the sum is 40.

The square root of 145739515 is about 12072.2622155087. The cubic root of 145739515 is about 526.2504012424.

The spelling of 145739515 in words is "one hundred forty-five million, seven hundred thirty-nine thousand, five hundred fifteen".