1225154700 has 576 divisors, whose sum is σ = 5039677440. Its totient is φ = 247968000.

The previous prime is 1225154699. The next prime is 1225154719. The reversal of 1225154700 is 74515221.

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

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14760859 + ... + 14760941.

It is an arithmetic number, because the mean of its divisors is an integer number (8749440).

Almost surely, 2^1225154700 is an apocalyptic number.

1225154700 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 1225154700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2519838720).

1225154700 is an abundant number, since it is smaller than the sum of its proper divisors (3814522740).

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

1225154700 is a wasteful number, since it uses less digits than its factorization.

1225154700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 1225154700 is about 35002.2099302315. The cubic root of 1225154700 is about 1070.0325200469.

Adding to 1225154700 its reverse (74515221), we get a palindrome (1299669921).

The spelling of 1225154700 in words is "one billion, two hundred twenty-five million, one hundred fifty-four thousand, seven hundred".