1013681 has 2 divisors, whose sum is σ = 1013682. Its totient is φ = 1013680.

The previous prime is 1013671. The next prime is 1013687. The reversal of 1013681 is 1863101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 167281 = 920^2 + 409^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013681 - 2¹⁰ = 1012657 is a prime.

It is a super-2 number, since 2×1013681² = 2055098339522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1013687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506840 + 506841.

It is an arithmetic number, because the mean of its divisors is an integer number (506841).

2^1013681 is an apocalyptic number.

It is an amenable number.

1013681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013681 is an equidigital number, since it uses as much as digits as its factorization.

1013681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1013681 is about 1006.8172624662. The cubic root of 1013681 is about 100.4539693332.

Adding to 1013681 its reverse (1863101), we get a palindrome (2876782).

The spelling of 1013681 in words is "one million, thirteen thousand, six hundred eighty-one".