1221051246 has 16 divisors (see below), whose sum is σ = 2451835008. Its totient is φ = 405395000.

The previous prime is 1221051241. The next prime is 1221051277. The reversal of 1221051246 is 6421501221.

It is a super-2 number, since 2×1221051246² = 2981932290716305032, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221051241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403890 + ... + 406901.

It is an arithmetic number, because the mean of its divisors is an integer number (153239688).

Almost surely, 2^1221051246 is an apocalyptic number.

1221051246 is an abundant number, since it is smaller than the sum of its proper divisors (1230783762).

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

1221051246 is a wasteful number, since it uses less digits than its factorization.

1221051246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811047.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1221051246 is about 34943.5436955098. The cubic root of 1221051246 is about 1068.8365512205.

Adding to 1221051246 its reverse (6421501221), we get a palindrome (7642552467).

The spelling of 1221051246 in words is "one billion, two hundred twenty-one million, fifty-one thousand, two hundred forty-six".