1225494400 has 192 divisors, whose sum is σ = 3306819600. Its totient is φ = 446054400.

The previous prime is 1225494397. The next prime is 1225494409. The reversal of 1225494400 is 44945221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225494409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3702235 + ... + 3702565.

Almost surely, 2^1225494400 is an apocalyptic number.

1225494400 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 1225494400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1653409800).

1225494400 is an abundant number, since it is smaller than the sum of its proper divisors (2081325200).

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

1225494400 is a wasteful number, since it uses less digits than its factorization.

1225494400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1225494400 is about 35007.0621446588. The cubic root of 1225494400 is about 1070.1314072751.

The spelling of 1225494400 in words is "one billion, two hundred twenty-five million, four hundred ninety-four thousand, four hundred".