721054 has 8 divisors (see below), whose sum is σ = 1097928. Its totient is φ = 355080.

The previous prime is 721051. The next prime is 721057. The reversal of 721054 is 450127.

It is an interprime number because it is at equal distance from previous prime (721051) and next prime (721057).

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2557 + ... + 2824.

It is an arithmetic number, because the mean of its divisors is an integer number (137241).

2⁷²¹⁰⁵⁴ is an apocalyptic number.

721054 is a deficient number, since it is larger than the sum of its proper divisors (376874).

721054 is a wasteful number, since it uses less digits than its factorization.

721054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5450.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 721054 is about 849.1489857499. The cubic root of 721054 is about 89.6718087981.

It can be divided in two parts, 72105 and 4, that multiplied together give a triangular number (288420 = T₇₅₉).

The spelling of 721054 in words is "seven hundred twenty-one thousand, fifty-four".