721450148 has 24 divisors (see below), whose sum is σ = 1337757624. Its totient is φ = 339264000.

The previous prime is 721450127. The next prime is 721450201. The reversal of 721450148 is 841054127.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 88021924 + 633428224 = 9382^2 + 25168^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 123698 + ... + 129398.

It is an arithmetic number, because the mean of its divisors is an integer number (55739901).

Almost surely, 2^721450148 is an apocalyptic number.

It is an amenable number.

721450148 is a deficient number, since it is larger than the sum of its proper divisors (616307476).

721450148 is a wasteful number, since it uses less digits than its factorization.

721450148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7583 (or 7581 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 721450148 is about 26859.8240500566. The cubic root of 721450148 is about 896.8822772751.

The spelling of 721450148 in words is "seven hundred twenty-one million, four hundred fifty thousand, one hundred forty-eight".