1225440250 has 32 divisors (see below), whose sum is σ = 2303071056. Its totient is φ = 488243200.

The previous prime is 1225440241. The next prime is 1225440277. The reversal of 1225440250 is 520445221.

It can be written as a sum of positive squares in 8 ways, for example, as 36638809 + 1188801441 = 6053^2 + 34479^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54714 + ... + 73786.

Almost surely, 2^1225440250 is an apocalyptic number.

1225440250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225440250 is a deficient number, since it is larger than the sum of its proper divisors (1077630806).

1225440250 is a wasteful number, since it uses less digits than its factorization.

1225440250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19347 (or 19337 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1225440250 is about 35006.2887207427. The cubic root of 1225440250 is about 1070.1156453456.

Adding to 1225440250 its reverse (520445221), we get a palindrome (1745885471).

The spelling of 1225440250 in words is "one billion, two hundred twenty-five million, four hundred forty thousand, two hundred fifty".