1221716254 has 64 divisors (see below), whose sum is σ = 2230778880. Its totient is φ = 494968320.

The previous prime is 1221716239. The next prime is 1221716273. The reversal of 1221716254 is 4526171221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 936967 + ... + 938269.

It is an arithmetic number, because the mean of its divisors is an integer number (34855920).

Almost surely, 2^1221716254 is an apocalyptic number.

1221716254 is a deficient number, since it is larger than the sum of its proper divisors (1009062626).

1221716254 is a wasteful number, since it uses less digits than its factorization.

1221716254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its digits is 6720, while the sum is 31.

The square root of 1221716254 is about 34953.0578633687. The cubic root of 1221716254 is about 1069.0305523221.

Adding to 1221716254 its reverse (4526171221), we get a palindrome (5747887475).

The spelling of 1221716254 in words is "one billion, two hundred twenty-one million, seven hundred sixteen thousand, two hundred fifty-four".