121236406 has 8 divisors (see below), whose sum is σ = 185724000. Its totient is φ = 59328408.

The previous prime is 121236391. The next prime is 121236413. The reversal of 121236406 is 604632121.

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

It is a super-2 number, since 2×121236406² = 29396532279593672, which contains 22 as substring.

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, 644781 + ... + 644968.

It is an arithmetic number, because the mean of its divisors is an integer number (23215500).

Almost surely, 2^121236406 is an apocalyptic number.

121236406 is a deficient number, since it is larger than the sum of its proper divisors (64487594).

121236406 is a wasteful number, since it uses less digits than its factorization.

121236406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289798.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 121236406 is about 11010.7404837277. The cubic root of 121236406 is about 494.9306517821.

Adding to 121236406 its reverse (604632121), we get a palindrome (725868527).

The spelling of 121236406 in words is "one hundred twenty-one million, two hundred thirty-six thousand, four hundred six".