1242134136 has 64 divisors (see below), whose sum is σ = 3600403200. Its totient is φ = 396041184.

The previous prime is 1242134123. The next prime is 1242134147. The reversal of 1242134136 is 6314312421.

It is a happy number.

1242134136 is a `hidden beast` number, since 1 + 242 + 1 + 3 + 413 + 6 = 666.

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, 120046 + ... + 129981.

It is an arithmetic number, because the mean of its divisors is an integer number (56256300).

Almost surely, 2^1242134136 is an apocalyptic number.

It is an amenable number.

1242134136 is an abundant number, since it is smaller than the sum of its proper divisors (2358269064).

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

1242134136 is a wasteful number, since it uses less digits than its factorization.

1242134136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250065 (or 250055 counting only the distinct ones).

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

The square root of 1242134136 is about 35243.9233911323. The cubic root of 1242134136 is about 1074.9530568288.

Adding to 1242134136 its reverse (6314312421), we get a palindrome (7556446557).

The spelling of 1242134136 in words is "one billion, two hundred forty-two million, one hundred thirty-four thousand, one hundred thirty-six".