977281 has 8 divisors (see below), whose sum is σ = 1022504. Its totient is φ = 933120.

The previous prime is 977269. The next prime is 977299. The reversal of 977281 is 182779.

977281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9025 + 968256 = 95^2 + 984^2 .

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

It is a 6-Lehmer number, since φ(977281) divides (977281-1)⁶.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977281 is a prime.

It is a super-2 number, since 2×977281² = 1910156305922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2041 + ... + 2473.

It is an arithmetic number, because the mean of its divisors is an integer number (127813).

2⁹⁷⁷²⁸¹ is an apocalyptic number.

It is an amenable number.

977281 is a deficient number, since it is larger than the sum of its proper divisors (45223).

977281 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (977280) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (531).

977281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531.

The product of its digits is 7056, while the sum is 34.

The square root of 977281 is about 988.5752373998. The cubic root of 977281 is about 99.2368914665.

Subtracting from 977281 its product of digits (7056), we obtain a square (970225 = 985²).

The spelling of 977281 in words is "nine hundred seventy-seven thousand, two hundred eighty-one".