121642545 has 8 divisors (see below), whose sum is σ = 194628096. Its totient is φ = 64876016.

The previous prime is 121642537. The next prime is 121642553. The reversal of 121642545 is 545246121.

It is an interprime number because it is at equal distance from previous prime (121642537) and next prime (121642553).

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 121642545 - 2³ = 121642537 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4054737 + ... + 4054766.

It is an arithmetic number, because the mean of its divisors is an integer number (24328512).

Almost surely, 2^121642545 is an apocalyptic number.

121642545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121642545 is a deficient number, since it is larger than the sum of its proper divisors (72985551).

121642545 is an equidigital number, since it uses as much as digits as its factorization.

121642545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109511.

The product of its digits is 9600, while the sum is 30.

The square root of 121642545 is about 11029.1679196574. The cubic root of 121642545 is about 495.4827043191.

Adding to 121642545 its reverse (545246121), we get a palindrome (666888666).

The spelling of 121642545 in words is "one hundred twenty-one million, six hundred forty-two thousand, five hundred forty-five".