1242061128 has 480 divisors, whose sum is σ = 4572986880. Its totient is φ = 307929600.

The previous prime is 1242061099. The next prime is 1242061133. The reversal of 1242061128 is 8211602421.

1242061128 is a `hidden beast` number, since 1 + 2 + 4 + 20 + 611 + 28 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 17014500 + ... + 17014572.

It is an arithmetic number, because the mean of its divisors is an integer number (9527056).

Almost surely, 2^1242061128 is an apocalyptic number.

1242061128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242061128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2286493440).

1242061128 is an abundant number, since it is smaller than the sum of its proper divisors (3330925752).

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

1242061128 is a wasteful number, since it uses less digits than its factorization.

1242061128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1242061128 is about 35242.8876228949. The cubic root of 1242061128 is about 1074.9319958424.

Adding to 1242061128 its reverse (8211602421), we get a palindrome (9453663549).

The spelling of 1242061128 in words is "one billion, two hundred forty-two million, sixty-one thousand, one hundred twenty-eight".