1225454544 has 120 divisors (see below), whose sum is σ = 3526024320. Its totient is φ = 397154304.

The previous prime is 1225454507. The next prime is 1225454597. The reversal of 1225454544 is 4454545221.

1225454544 is a `hidden beast` number, since 1 + 22 + 54 + 545 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1225454499 and 1225454508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 823369 + ... + 824855.

It is an arithmetic number, because the mean of its divisors is an integer number (29383536).

Almost surely, 2^1225454544 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 1225454544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1763012160).

1225454544 is an abundant number, since it is smaller than the sum of its proper divisors (2300569776).

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

1225454544 is a wasteful number, since it uses less digits than its factorization.

1225454544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657 (or 1648 counting only the distinct ones).

The product of its digits is 128000, while the sum is 36.

The square root of 1225454544 is about 35006.4928834638. The cubic root of 1225454544 is about 1070.1198060743.

Adding to 1225454544 its reverse (4454545221), we get a palindrome (5679999765).

The spelling of 1225454544 in words is "one billion, two hundred twenty-five million, four hundred fifty-four thousand, five hundred forty-four".