1225196544 has 176 divisors, whose sum is σ = 3837879360. Its totient is φ = 342589440.

The previous prime is 1225196527. The next prime is 1225196569. The reversal of 1225196544 is 4456915221.

It is a tau number, because it is divible by the number of its divisors (176).

It is a super-2 number, since 2×1225196544² = 3002213142859087872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437902 + ... + 440690.

Almost surely, 2^1225196544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225196544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1918939680).

1225196544 is an abundant number, since it is smaller than the sum of its proper divisors (2612682816).

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

1225196544 is a wasteful number, since it uses less digits than its factorization.

1225196544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836 (or 2818 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 1225196544 is about 35002.8076588150. The cubic root of 1225196544 is about 1070.0447018911.

The spelling of 1225196544 in words is "one billion, two hundred twenty-five million, one hundred ninety-six thousand, five hundred forty-four".