726597122 has 4 divisors (see below), whose sum is σ = 1089895686. Its totient is φ = 363298560.

The previous prime is 726597097. The next prime is 726597143. The reversal of 726597122 is 221795627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221795627 = 157 ⋅1412711.

It can be written as a sum of positive squares in only one way, i.e., 642673201 + 83923921 = 25351^2 + 9161^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 726597122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181649279 + ... + 181649282.

Almost surely, 2^726597122 is an apocalyptic number.

726597122 is a deficient number, since it is larger than the sum of its proper divisors (363298564).

726597122 is a wasteful number, since it uses less digits than its factorization.

726597122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363298563.

The product of its digits is 105840, while the sum is 41.

The square root of 726597122 is about 26955.4655311312. The cubic root of 726597122 is about 899.0100728764.

The spelling of 726597122 in words is "seven hundred twenty-six million, five hundred ninety-seven thousand, one hundred twenty-two".