121644542 has 8 divisors (see below), whose sum is σ = 183629496. Its totient is φ = 60434712.

The previous prime is 121644461. The next prime is 121644557. The reversal of 121644542 is 245446121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193388 + ... + 194015.

It is an arithmetic number, because the mean of its divisors is an integer number (22953687).

Almost surely, 2^121644542 is an apocalyptic number.

121644542 is a deficient number, since it is larger than the sum of its proper divisors (61984954).

121644542 is a wasteful number, since it uses less digits than its factorization.

121644542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387562.

The product of its digits is 7680, while the sum is 29.

The square root of 121644542 is about 11029.2584519541. The cubic root of 121644542 is about 495.4854157431.

The spelling of 121644542 in words is "one hundred twenty-one million, six hundred forty-four thousand, five hundred forty-two".