1366425 has 18 divisors (see below), whose sum is σ = 2447822. Its totient is φ = 728640.

The previous prime is 1366397. The next prime is 1366427. The reversal of 1366425 is 5246631.

1366425 is a `hidden beast` number, since 13 + 6 + 642 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 301401 + 1065024 = 549^2 + 1032^2 .

It is not a de Polignac number, because 1366425 - 2⁷ = 1366297 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 (1366427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2812 + ... + 3261.

2^1366425 is an apocalyptic number.

1366425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1366425 is a deficient number, since it is larger than the sum of its proper divisors (1081397).

1366425 is a wasteful number, since it uses less digits than its factorization.

1366425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6089 (or 6081 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1366425 is about 1168.9418291771. The cubic root of 1366425 is about 110.9673631831.

It can be divided in two parts, 13664 and 25, that added together give a square (13689 = 117²).

The spelling of 1366425 in words is "one million, three hundred sixty-six thousand, four hundred twenty-five".