1243214136 has 64 divisors (see below), whose sum is σ = 3537626400. Its totient is φ = 404294400.

The previous prime is 1243214081. The next prime is 1243214153. The reversal of 1243214136 is 6314123421.

It is a happy number.

1243214136 is a `hidden beast` number, since 1 + 243 + 2 + 1 + 413 + 6 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61335 + ... + 79046.

Almost surely, 2^1243214136 is an apocalyptic number.

It is an amenable number.

1243214136 is an abundant number, since it is smaller than the sum of its proper divisors (2294412264).

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

1243214136 is a wasteful number, since it uses less digits than its factorization.

1243214136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140437 (or 140427 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1243214136 is about 35259.2418523144. The cubic root of 1243214136 is about 1075.2645135278.

Adding to 1243214136 its reverse (6314123421), we get a palindrome (7557337557).

The spelling of 1243214136 in words is "one billion, two hundred forty-three million, two hundred fourteen thousand, one hundred thirty-six".