1121428742 has 16 divisors (see below), whose sum is σ = 1963353600. Its totient is φ = 470386248.

The previous prime is 1121428739. The next prime is 1121428757. The reversal of 1121428742 is 2478241211.

It is a junction number, because it is equal to n+sod(n) for n = 1121428699 and 1121428708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851492 + ... + 852807.

It is an arithmetic number, because the mean of its divisors is an integer number (122709600).

Almost surely, 2^1121428742 is an apocalyptic number.

1121428742 is a deficient number, since it is larger than the sum of its proper divisors (841924858).

1121428742 is a wasteful number, since it uses less digits than its factorization.

1121428742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704355.

The product of its digits is 7168, while the sum is 32.

The square root of 1121428742 is about 33487.7401745773. The cubic root of 1121428742 is about 1038.9402240632.

Adding to 1121428742 its reverse (2478241211), we get a palindrome (3599669953).

The spelling of 1121428742 in words is "one billion, one hundred twenty-one million, four hundred twenty-eight thousand, seven hundred forty-two".