1122401280 has 704 divisors, whose sum is σ = 4886074368. Its totient is φ = 212336640.

The previous prime is 1122401261. The next prime is 1122401303. The reversal of 1122401280 is 821042211.

It is a tau number, because it is divible by the number of its divisors (704).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15375324 + ... + 15375396.

Almost surely, 2^1122401280 is an apocalyptic number.

1122401280 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 1122401280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2443037184).

1122401280 is an abundant number, since it is smaller than the sum of its proper divisors (3763673088).

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

1122401280 is a wasteful number, since it uses less digits than its factorization.

1122401280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 1122401280 is about 33502.2578343610. The cubic root of 1122401280 is about 1039.2404710797.

Adding to 1122401280 its reverse (821042211), we get a palindrome (1943443491).

The spelling of 1122401280 in words is "one billion, one hundred twenty-two million, four hundred one thousand, two hundred eighty".