121406747 has 32 divisors (see below), whose sum is σ = 155810304. Its totient is φ = 91872000.

The previous prime is 121406743. The next prime is 121406749. The reversal of 121406747 is 747604121.

It is not a de Polignac number, because 121406747 - 2² = 121406743 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121406743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 520943 + ... + 521175.

It is an arithmetic number, because the mean of its divisors is an integer number (4869072).

Almost surely, 2^121406747 is an apocalyptic number.

121406747 is a deficient number, since it is larger than the sum of its proper divisors (34403557).

121406747 is a wasteful number, since it uses less digits than its factorization.

121406747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 121406747 is about 11018.4729885770. The cubic root of 121406747 is about 495.1623410660.

The spelling of 121406747 in words is "one hundred twenty-one million, four hundred six thousand, seven hundred forty-seven".