1121671540 has 48 divisors (see below), whose sum is σ = 2572282944. Its totient is φ = 407462400.

The previous prime is 1121671531. The next prime is 1121671583. The reversal of 1121671540 is 451761211.

It is a junction number, because it is equal to n+sod(n) for n = 1121671499 and 1121671508.

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, 283375 + ... + 287305.

It is an arithmetic number, because the mean of its divisors is an integer number (53589228).

Almost surely, 2^1121671540 is an apocalyptic number.

1121671540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121671540 is an abundant number, since it is smaller than the sum of its proper divisors (1450611404).

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

1121671540 is a wasteful number, since it uses less digits than its factorization.

1121671540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248 (or 5246 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1121671540 is about 33491.3651558129. The cubic root of 1121671540 is about 1039.0151981851.

It can be divided in two parts, 1121671 and 540, that added together give a palindrome (1122211).

The spelling of 1121671540 in words is "one billion, one hundred twenty-one million, six hundred seventy-one thousand, five hundred forty".