121261406 has 8 divisors (see below), whose sum is σ = 207876720. Its totient is φ = 51969168.

The previous prime is 121261373. The next prime is 121261417. The reversal of 121261406 is 604162121.

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, 4330751 + ... + 4330778.

It is an arithmetic number, because the mean of its divisors is an integer number (25984590).

Almost surely, 2^121261406 is an apocalyptic number.

121261406 is a deficient number, since it is larger than the sum of its proper divisors (86615314).

121261406 is an equidigital number, since it uses as much as digits as its factorization.

121261406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8661538.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 121261406 is about 11011.8756803734. The cubic root of 121261406 is about 494.9646691104.

The spelling of 121261406 in words is "one hundred twenty-one million, two hundred sixty-one thousand, four hundred six".