1225350400 has 54 divisors (see below), whose sum is σ = 3032949542. Its totient is φ = 490137600.

The previous prime is 1225350397. The next prime is 1225350419. The reversal of 1225350400 is 40535221.

It can be written as a sum of positive squares in 3 ways, for example, as 238887936 + 986462464 = 15456^2 + 31408^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89331 + ... + 102130.

Almost surely, 2^1225350400 is an apocalyptic number.

1225350400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225350400 is an abundant number, since it is smaller than the sum of its proper divisors (1807599142).

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

1225350400 is an equidigital number, since it uses as much as digits as its factorization.

1225350400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191487 (or 191468 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1225350400 is about 35005.0053563773. The cubic root of 1225350400 is about 1070.0894908701.

Adding to 1225350400 its reverse (40535221), we get a palindrome (1265885621).

The spelling of 1225350400 in words is "one billion, two hundred twenty-five million, three hundred fifty thousand, four hundred".