681262201 has 9 divisors (see below), whose sum is σ = 698624901. Its totient is φ = 664322652.

The previous prime is 681262193. The next prime is 681262217. The reversal of 681262201 is 102262186.

The square root of 681262201 is 26101.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 681262201 - 2³ = 681262193 is a prime.

It is a super-2 number, since 2×681262201² = 928236373022728802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681262201.

It is not an unprimeable number, because it can be changed into a prime (681262261) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1122040 + ... + 1122646.

It is an arithmetic number, because the mean of its divisors is an integer number (77624989).

Almost surely, 2^681262201 is an apocalyptic number.

681262201 is the 26101-st square number.

681262201 is the 13051-st centered octagonal number.

It is an amenable number.

681262201 is a deficient number, since it is larger than the sum of its proper divisors (17362700).

681262201 is an frugal number, since it uses more digits than its factorization.

681262201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The cubic root of 681262201 is about 879.9096846878.

Multiplying 681262201 by its product of nonzero digits (2304), we get a square (1569628111104 = 1252848²).

The spelling of 681262201 in words is "six hundred eighty-one million, two hundred sixty-two thousand, two hundred one".