1121400040 has 16 divisors (see below), whose sum is σ = 2523150180. Its totient is φ = 448560000.

The previous prime is 1121400031. The next prime is 1121400041. The reversal of 1121400040 is 400041211.

It can be written as a sum of positive squares in 2 ways, for example, as 1017482404 + 103917636 = 31898^2 + 10194^2 .

It is not an unprimeable number, because it can be changed into a prime (1121400041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14017461 + ... + 14017540.

Almost surely, 2^1121400040 is an apocalyptic number.

1121400040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121400040 is an abundant number, since it is smaller than the sum of its proper divisors (1401750140).

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

1121400040 is a wasteful number, since it uses less digits than its factorization.

1121400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28035012 (or 28035008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1121400040 is about 33487.3116269431. The cubic root of 1121400040 is about 1038.9313603950.

Adding to 1121400040 its reverse (400041211), we get a palindrome (1521441251).

The spelling of 1121400040 in words is "one billion, one hundred twenty-one million, four hundred thousand, forty".