1222541440 has 128 divisors (see below), whose sum is σ = 3022790400. Its totient is φ = 472547328.

The previous prime is 1222541431. The next prime is 1222541449. The reversal of 1222541440 is 441452221.

It is an interprime number because it is at equal distance from previous prime (1222541431) and next prime (1222541449).

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1222541449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2917551 + ... + 2917969.

It is an arithmetic number, because the mean of its divisors is an integer number (23615550).

Almost surely, 2^1222541440 is an apocalyptic number.

1222541440 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 1222541440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1511395200).

1222541440 is an abundant number, since it is smaller than the sum of its proper divisors (1800248960).

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

1222541440 is an equidigital number, since it uses as much as digits as its factorization.

1222541440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1222541440 is about 34964.8600740801. The cubic root of 1222541440 is about 1069.2711838944.

Adding to 1222541440 its reverse (441452221), we get a palindrome (1663993661).

The spelling of 1222541440 in words is "one billion, two hundred twenty-two million, five hundred forty-one thousand, four hundred forty".