121672406 has 4 divisors (see below), whose sum is σ = 182508612. Its totient is φ = 60836202.

The previous prime is 121672387. The next prime is 121672423. The reversal of 121672406 is 604276121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30418100 + ... + 30418103.

It is an arithmetic number, because the mean of its divisors is an integer number (45627153).

Almost surely, 2^121672406 is an apocalyptic number.

121672406 is a deficient number, since it is larger than the sum of its proper divisors (60836206).

121672406 is an equidigital number, since it uses as much as digits as its factorization.

121672406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60836205.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 121672406 is about 11030.5215651845. The cubic root of 121672406 is about 495.5232449554.

The spelling of 121672406 in words is "one hundred twenty-one million, six hundred seventy-two thousand, four hundred six".