1121126640 has 160 divisors (see below), whose sum is σ = 3590770176. Its totient is φ = 289152000.

The previous prime is 1121126639. The next prime is 1121126641. The reversal of 1121126640 is 466211211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1121126639) and next prime (1121126641).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1121126640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121126641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2228629 + ... + 2229131.

Almost surely, 2^1121126640 is an apocalyptic number.

1121126640 is a gapful number since it is divisible by the number (10) 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 1121126640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1795385088).

1121126640 is an abundant number, since it is smaller than the sum of its proper divisors (2469643536).

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

1121126640 is a wasteful number, since it uses less digits than its factorization.

1121126640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1121126640 is about 33483.2292349469. The cubic root of 1121126640 is about 1038.8469222194.

Adding to 1121126640 its reverse (466211211), we get a palindrome (1587337851).

The spelling of 1121126640 in words is "one billion, one hundred twenty-one million, one hundred twenty-six thousand, six hundred forty".