121662538 has 8 divisors (see below), whose sum is σ = 188380800. Its totient is φ = 58868940.

The previous prime is 121662533. The next prime is 121662559. The reversal of 121662538 is 835266121.

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

It is not an unprimeable number, because it can be changed into a prime (121662533) 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 3 ways as a sum of consecutive naturals, for example, 981088 + ... + 981211.

It is an arithmetic number, because the mean of its divisors is an integer number (23547600).

Almost surely, 2^121662538 is an apocalyptic number.

121662538 is a deficient number, since it is larger than the sum of its proper divisors (66718262).

121662538 is a wasteful number, since it uses less digits than its factorization.

121662538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962332.

The product of its digits is 17280, while the sum is 34.

The square root of 121662538 is about 11030.0742517900. The cubic root of 121662538 is about 495.5098484488.

The spelling of 121662538 in words is "one hundred twenty-one million, six hundred sixty-two thousand, five hundred thirty-eight".