715618 has 4 divisors (see below), whose sum is σ = 1073430. Its totient is φ = 357808.

The previous prime is 715613. The next prime is 715621. The reversal of 715618 is 816517.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 558009 + 157609 = 747^2 + 397^2 .

It is not an unprimeable number, because it can be changed into a prime (715613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178903 + ... + 178906.

2⁷¹⁵⁶¹⁸ is an apocalyptic number.

715618 is a deficient number, since it is larger than the sum of its proper divisors (357812).

715618 is a wasteful number, since it uses less digits than its factorization.

715618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357811.

The product of its digits is 1680, while the sum is 28.

The square root of 715618 is about 845.9420783954. The cubic root of 715618 is about 89.4458959538.

It can be divided in two parts, 7 and 15618, that added together give a 6-th power (15625 = 5⁶).

The spelling of 715618 in words is "seven hundred fifteen thousand, six hundred eighteen".