145857515 has 8 divisors (see below), whose sum is σ = 179759760. Its totient is φ = 113532192.

The previous prime is 145857493. The next prime is 145857521. The reversal of 145857515 is 515758541.

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 145857515 - 2⁸ = 145857259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394025 + ... + 394394.

It is an arithmetic number, because the mean of its divisors is an integer number (22469970).

Almost surely, 2^145857515 is an apocalyptic number.

145857515 is a deficient number, since it is larger than the sum of its proper divisors (33902245).

145857515 is an equidigital number, since it uses as much as digits as its factorization.

145857515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788461.

The product of its digits is 140000, while the sum is 41.

The square root of 145857515 is about 12077.1484631100. The cubic root of 145857515 is about 526.3923915496.

The spelling of 145857515 in words is "one hundred forty-five million, eight hundred fifty-seven thousand, five hundred fifteen".