1223251040 has 96 divisors (see below), whose sum is σ = 3161410560. Its totient is φ = 443584000.

The previous prime is 1223251039. The next prime is 1223251079. The reversal of 1223251040 is 401523221.

It is a super-2 number, since 2×1223251040² = 2992686213722163200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 842315 + ... + 843765.

It is an arithmetic number, because the mean of its divisors is an integer number (32931360).

Almost surely, 2^1223251040 is an apocalyptic number.

1223251040 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 1223251040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1580705280).

1223251040 is an abundant number, since it is smaller than the sum of its proper divisors (1938159520).

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

1223251040 is a wasteful number, since it uses less digits than its factorization.

1223251040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1223251040 is about 34975.0059328086. The cubic root of 1223251040 is about 1069.4780229847.

Adding to 1223251040 its reverse (401523221), we get a palindrome (1624774261).

The spelling of 1223251040 in words is "one billion, two hundred twenty-three million, two hundred fifty-one thousand, forty".