1213132646 has 16 divisors (see below), whose sum is σ = 1985722128. Its totient is φ = 551258400.

The previous prime is 1213132643. The next prime is 1213132649. The reversal of 1213132646 is 6462313121.

It is an interprime number because it is at equal distance from previous prime (1213132643) and next prime (1213132649).

It is a super-2 number, since 2×1213132646² = 2943381633581922632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213132643) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 95696 + ... + 107628.

It is an arithmetic number, because the mean of its divisors is an integer number (124107633).

Almost surely, 2^1213132646 is an apocalyptic number.

1213132646 is a deficient number, since it is larger than the sum of its proper divisors (772589482).

1213132646 is a wasteful number, since it uses less digits than its factorization.

1213132646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16567.

The product of its digits is 5184, while the sum is 29.

The square root of 1213132646 is about 34830.0537754394. The cubic root of 1213132646 is about 1066.5210461148.

Adding to 1213132646 its reverse (6462313121), we get a palindrome (7675445767).

The spelling of 1213132646 in words is "one billion, two hundred thirteen million, one hundred thirty-two thousand, six hundred forty-six".