121632646 has 4 divisors (see below), whose sum is σ = 182448972. Its totient is φ = 60816322.

The previous prime is 121632631. The next prime is 121632649. The reversal of 121632646 is 646236121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646236121 = 43 ⋅15028747.

It is a super-2 number, since 2×121632646² = 29589001145922632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121632649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30408160 + ... + 30408163.

It is an arithmetic number, because the mean of its divisors is an integer number (45612243).

Almost surely, 2^121632646 is an apocalyptic number.

121632646 is a deficient number, since it is larger than the sum of its proper divisors (60816326).

121632646 is an equidigital number, since it uses as much as digits as its factorization.

121632646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60816325.

The product of its digits is 10368, while the sum is 31.

The square root of 121632646 is about 11028.7191459389. The cubic root of 121632646 is about 495.4692635274.

Adding to 121632646 its reverse (646236121), we get a palindrome (767868767).

The spelling of 121632646 in words is "one hundred twenty-one million, six hundred thirty-two thousand, six hundred forty-six".