1225547250 has 128 divisors (see below), whose sum is σ = 3215496960. Its totient is φ = 310833600.

The previous prime is 1225547227. The next prime is 1225547311. The reversal of 1225547250 is 527455221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18291717 + ... + 18291783.

It is an arithmetic number, because the mean of its divisors is an integer number (25121070).

Almost surely, 2^1225547250 is an apocalyptic number.

1225547250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225547250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607748480).

1225547250 is an abundant number, since it is smaller than the sum of its proper divisors (1989949710).

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

1225547250 is an frugal number, since it uses more digits than its factorization.

1225547250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 33.

The square root of 1225547250 is about 35007.8169842108. The cubic root of 1225547250 is about 1070.1467903542.

The spelling of 1225547250 in words is "one billion, two hundred twenty-five million, five hundred forty-seven thousand, two hundred fifty".