1225251554 has 16 divisors (see below), whose sum is σ = 1890701568. Its totient is φ = 595208352.

The previous prime is 1225251539. The next prime is 1225251571. The reversal of 1225251554 is 4551525221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225251554.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34694 + ... + 60449.

It is an arithmetic number, because the mean of its divisors is an integer number (118168848).

Almost surely, 2^1225251554 is an apocalyptic number.

1225251554 is a deficient number, since it is larger than the sum of its proper divisors (665450014).

1225251554 is a wasteful number, since it uses less digits than its factorization.

1225251554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95329.

The product of its digits is 20000, while the sum is 32.

The square root of 1225251554 is about 35003.5934441023. The cubic root of 1225251554 is about 1070.0607162682.

Adding to 1225251554 its reverse (4551525221), we get a palindrome (5776776775).

The spelling of 1225251554 in words is "one billion, two hundred twenty-five million, two hundred fifty-one thousand, five hundred fifty-four".