1242135054 has 16 divisors (see below), whose sum is σ = 2760300240. Its totient is φ = 414045000.

The previous prime is 1242135049. The next prime is 1242135101. The reversal of 1242135054 is 4505312421.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11501197 + ... + 11501304.

It is an arithmetic number, because the mean of its divisors is an integer number (172518765).

Almost surely, 2^1242135054 is an apocalyptic number.

1242135054 is an abundant number, since it is smaller than the sum of its proper divisors (1518165186).

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

1242135054 is a wasteful number, since it uses less digits than its factorization.

1242135054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23002512 (or 23002506 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1242135054 is about 35243.9364146515. The cubic root of 1242135054 is about 1074.9533216436.

Adding to 1242135054 its reverse (4505312421), we get a palindrome (5747447475).

The spelling of 1242135054 in words is "one billion, two hundred forty-two million, one hundred thirty-five thousand, fifty-four".