1366731 has 12 divisors (see below), whose sum is σ = 1987440. Its totient is φ = 905040.

The previous prime is 1366721. The next prime is 1366747. The reversal of 1366731 is 1376631.

It is not a de Polignac number, because 1366731 - 2⁶ = 1366667 is a prime.

It is a super-2 number, since 2×1366731² = 3735907252722, which contains 22 as substring.

1366731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1366695 and 1366704.

It is not an unprimeable number, because it can be changed into a prime (1366721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1210 + ... + 2048.

It is an arithmetic number, because the mean of its divisors is an integer number (165620).

2^1366731 is an apocalyptic number.

1366731 is a deficient number, since it is larger than the sum of its proper divisors (620709).

1366731 is a wasteful number, since it uses less digits than its factorization.

1366731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 1023 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 1366731 is about 1169.0727094582. The cubic root of 1366731 is about 110.9756459840.

The spelling of 1366731 in words is "one million, three hundred sixty-six thousand, seven hundred thirty-one".