1121992641 has 120 divisors (see below), whose sum is σ = 2198211840. Its totient is φ = 563371200.

The previous prime is 1121992621. The next prime is 1121992643. The reversal of 1121992641 is 1462991211.

It is a happy number.

1121992641 is a `hidden beast` number, since 1 + 1 + 2 + 1 + 9 + 9 + 2 + 641 = 666.

It is not a de Polignac number, because 1121992641 - 2⁵ = 1121992609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121992596 and 1121992605.

It is not an unprimeable number, because it can be changed into a prime (1121992643) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1353015 + ... + 1353843.

It is an arithmetic number, because the mean of its divisors is an integer number (18318432).

Almost surely, 2^1121992641 is an apocalyptic number.

1121992641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121992641 is a deficient number, since it is larger than the sum of its proper divisors (1076219199).

1121992641 is a wasteful number, since it uses less digits than its factorization.

1121992641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 881 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 1121992641 is about 33496.1586006515. The cubic root of 1121992641 is about 1039.1143350466.

The spelling of 1121992641 in words is "one billion, one hundred twenty-one million, nine hundred ninety-two thousand, six hundred forty-one".