1366236425 has 6 divisors (see below), whose sum is σ = 1694133198. Its totient is φ = 1092989120.

The previous prime is 1366236407. The next prime is 1366236427. The reversal of 1366236425 is 5246326631.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4700224 + 1361536201 = 2168^2 + 36899^2 .

It is not a de Polignac number, because 1366236425 - 2¹⁴ = 1366220041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1366236427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27324704 + ... + 27324753.

It is an arithmetic number, because the mean of its divisors is an integer number (282355533).

Almost surely, 2^1366236425 is an apocalyptic number.

It is an amenable number.

1366236425 is a deficient number, since it is larger than the sum of its proper divisors (327896773).

1366236425 is an equidigital number, since it uses as much as digits as its factorization.

1366236425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54649467 (or 54649462 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 1366236425 is about 36962.6355256224. The cubic root of 1366236425 is about 1109.6225822349.

The spelling of 1366236425 in words is "one billion, three hundred sixty-six million, two hundred thirty-six thousand, four hundred twenty-five".