1366551252 has 54 divisors (see below), whose sum is σ = 3796928954. Its totient is φ = 414105120.

The previous prime is 1366551211. The next prime is 1366551257. The reversal of 1366551252 is 2521556631.

1366551252 is a `hidden beast` number, since 1 + 36 + 65 + 512 + 52 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1242139536 + 124411716 = 35244^2 + 11154^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366551257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 152503 + ... + 161214.

Almost surely, 2^1366551252 is an apocalyptic number.

1366551252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1366551252 is an abundant number, since it is smaller than the sum of its proper divisors (2430377702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1366551252 is a wasteful number, since it uses less digits than its factorization.

1366551252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313749 (or 313733 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 1366551252 is about 36966.8939999021. The cubic root of 1366551252 is about 1109.7078071912.

The spelling of 1366551252 in words is "one billion, three hundred sixty-six million, five hundred fifty-one thousand, two hundred fifty-two".