721614 has 16 divisors (see below), whose sum is σ = 1456128. Its totient is φ = 238392.

The previous prime is 721613. The next prime is 721619. The reversal of 721614 is 416127.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289 + ... + 1235.

It is an arithmetic number, because the mean of its divisors is an integer number (91008).

2⁷²¹⁶¹⁴ is an apocalyptic number.

721614 is an abundant number, since it is smaller than the sum of its proper divisors (734514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721614 is a wasteful number, since it uses less digits than its factorization.

721614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its digits is 336, while the sum is 21.

The square root of 721614 is about 849.4786636520. The cubic root of 721614 is about 89.6950170546.

The spelling of 721614 in words is "seven hundred twenty-one thousand, six hundred fourteen".