721354 has 16 divisors (see below), whose sum is σ = 1169280. Its totient is φ = 332640.

The previous prime is 721351. The next prime is 721363. The reversal of 721354 is 453127.

It is not an unprimeable number, because it can be changed into a prime (721351) 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, 1327 + ... + 1789.

It is an arithmetic number, because the mean of its divisors is an integer number (73080).

2⁷²¹³⁵⁴ is an apocalyptic number.

721354 is a deficient number, since it is larger than the sum of its proper divisors (447926).

721354 is a wasteful number, since it uses less digits than its factorization.

721354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its digits is 840, while the sum is 22.

The square root of 721354 is about 849.3256148263. The cubic root of 721354 is about 89.6842432864.

The spelling of 721354 in words is "seven hundred twenty-one thousand, three hundred fifty-four".