121631547 has 8 divisors (see below), whose sum is σ = 162230544. Its totient is φ = 81060128.

The previous prime is 121631527. The next prime is 121631579. The reversal of 121631547 is 745136121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121631547 - 2¹⁴ = 121615163 is a prime.

It is a super-2 number, since 2×121631547² = 29588466451226418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121631527) 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, 7993 + ... + 17525.

It is an arithmetic number, because the mean of its divisors is an integer number (20278818).

Almost surely, 2^121631547 is an apocalyptic number.

121631547 is a deficient number, since it is larger than the sum of its proper divisors (40598997).

121631547 is an equidigital number, since it uses as much as digits as its factorization.

121631547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13789.

The product of its digits is 5040, while the sum is 30.

The square root of 121631547 is about 11028.6693213642. The cubic root of 121631547 is about 495.4677712680.

Adding to 121631547 its reverse (745136121), we get a palindrome (866767668).

The spelling of 121631547 in words is "one hundred twenty-one million, six hundred thirty-one thousand, five hundred forty-seven".