121251406 has 8 divisors (see below), whose sum is σ = 182044440. Its totient is φ = 60569928.

The previous prime is 121251359. The next prime is 121251419. The reversal of 121251406 is 604152121.

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, 25116 + ... + 29551.

It is an arithmetic number, because the mean of its divisors is an integer number (22755555).

Almost surely, 2^121251406 is an apocalyptic number.

121251406 is a deficient number, since it is larger than the sum of its proper divisors (60793034).

121251406 is a wasteful number, since it uses less digits than its factorization.

121251406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55778.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 121251406 is about 11011.4216157588. The cubic root of 121251406 is about 494.9510627402.

It can be divided in two parts, 12125 and 1406, that added together give a palindrome (13531).

The spelling of 121251406 in words is "one hundred twenty-one million, two hundred fifty-one thousand, four hundred six".