121641747 has 16 divisors (see below), whose sum is σ = 170539680. Its totient is φ = 77011200.

The previous prime is 121641721. The next prime is 121641763. The reversal of 121641747 is 747146121.

It is not a de Polignac number, because 121641747 - 2¹² = 121637651 is a prime.

It is a super-2 number, since 2×121641747² = 29593429226424018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121641347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6154 + ... + 16767.

It is an arithmetic number, because the mean of its divisors is an integer number (10658730).

Almost surely, 2^121641747 is an apocalyptic number.

121641747 is a deficient number, since it is larger than the sum of its proper divisors (48897933).

121641747 is a wasteful number, since it uses less digits than its factorization.

121641747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23014.

The product of its digits is 9408, while the sum is 33.

The square root of 121641747 is about 11029.1317427983. The cubic root of 121641747 is about 495.4816208274.

Adding to 121641747 its reverse (747146121), we get a palindrome (868787868).

The spelling of 121641747 in words is "one hundred twenty-one million, six hundred forty-one thousand, seven hundred forty-seven".