997241285 has 4 divisors (see below), whose sum is σ = 1196689548. Its totient is φ = 797793024.

The previous prime is 997241281. The next prime is 997241309. The reversal of 997241285 is 582142799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 657871201 + 339370084 = 25649^2 + 18422^2 .

It is a cyclic number.

It is not a de Polignac number, because 997241285 - 2² = 997241281 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997241281) 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, 99724124 + ... + 99724133.

It is an arithmetic number, because the mean of its divisors is an integer number (299172387).

Almost surely, 2^997241285 is an apocalyptic number.

It is an amenable number.

997241285 is a deficient number, since it is larger than the sum of its proper divisors (199448263).

997241285 is a wasteful number, since it uses less digits than its factorization.

997241285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199448262.

The product of its digits is 362880, while the sum is 47.

The square root of 997241285 is about 31579.1273628642. The cubic root of 997241285 is about 999.0795814229.

It can be divided in two parts, 997 and 241285, that multiplied together give a triangular number (240561145 = T₂₁₉₃₄).

The spelling of 997241285 in words is "nine hundred ninety-seven million, two hundred forty-one thousand, two hundred eighty-five".