1225611432 has 128 divisors (see below), whose sum is σ = 3496608000. Its totient is φ = 397612800.

The previous prime is 1225611403. The next prime is 1225611521. The reversal of 1225611432 is 2341165221.

1225611432 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 611 + 43 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1225611396 and 1225611405.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1728294 + ... + 1729002.

It is an arithmetic number, because the mean of its divisors is an integer number (27317250).

Almost surely, 2^1225611432 is an apocalyptic number.

1225611432 is a gapful number since it is divisible by the number (12) 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 1225611432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1748304000).

1225611432 is an abundant number, since it is smaller than the sum of its proper divisors (2270996568).

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

1225611432 is a wasteful number, since it uses less digits than its factorization.

1225611432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 918 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1225611432 is about 35008.7336531900. The cubic root of 1225611432 is about 1070.1654712503.

Adding to 1225611432 its reverse (2341165221), we get a palindrome (3566776653).

The spelling of 1225611432 in words is "one billion, two hundred twenty-five million, six hundred eleven thousand, four hundred thirty-two".