5298781 has 8 divisors (see below), whose sum is σ = 5717304. Its totient is φ = 4892160.

The previous prime is 5298779. The next prime is 5298823. The reversal of 5298781 is 1878925.

5298781 = T₁₈₇₈ + T₁₈₇₉ + T₁₈₈₀.

5298781 is digitally balanced in base 3, 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 2924100 + 2374681 = 1710^2 + 1541^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5298781 - 2¹ = 5298779 is a prime.

It is a super-2 number, since 2×5298781² = 56154160171922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5298721) 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, 2040 + ... + 3841.

It is an arithmetic number, because the mean of its divisors is an integer number (714663).

Almost surely, 2^5298781 is an apocalyptic number.

5298781 is the 1880-th centered triangular number.

It is an amenable number.

5298781 is a deficient number, since it is larger than the sum of its proper divisors (418523).

5298781 is a wasteful number, since it uses less digits than its factorization.

5298781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5951.

The product of its digits is 40320, while the sum is 40.

The square root of 5298781 is about 2301.9081215374. The cubic root of 5298781 is about 174.3379721655.

The spelling of 5298781 in words is "five million, two hundred ninety-eight thousand, seven hundred eighty-one".