1221255462 has 32 divisors (see below), whose sum is σ = 2797173504. Its totient is φ = 348213600.

The previous prime is 1221255437. The next prime is 1221255463. The reversal of 1221255462 is 2645521221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221255463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8989 + ... + 50232.

It is an arithmetic number, because the mean of its divisors is an integer number (87411672).

Almost surely, 2^1221255462 is an apocalyptic number.

1221255462 is an abundant number, since it is smaller than the sum of its proper divisors (1575918042).

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

1221255462 is a wasteful number, since it uses less digits than its factorization.

1221255462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59724.

The product of its digits is 9600, while the sum is 30.

The square root of 1221255462 is about 34946.4656582035. The cubic root of 1221255462 is about 1068.8961341300.

Adding to 1221255462 its reverse (2645521221), we get a palindrome (3866776683).

The spelling of 1221255462 in words is "one billion, two hundred twenty-one million, two hundred fifty-five thousand, four hundred sixty-two".