121513406 has 8 divisors (see below), whose sum is σ = 208308720. Its totient is φ = 52077168.

The previous prime is 121513387. The next prime is 121513421. The reversal of 121513406 is 604315121.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4339751 + ... + 4339778.

It is an arithmetic number, because the mean of its divisors is an integer number (26038590).

Almost surely, 2^121513406 is an apocalyptic number.

121513406 is a deficient number, since it is larger than the sum of its proper divisors (86795314).

121513406 is an equidigital number, since it uses as much as digits as its factorization.

121513406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8679538.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 121513406 is about 11023.3119342600. The cubic root of 121513406 is about 495.3073029757.

Adding to 121513406 its reverse (604315121), we get a palindrome (725828527).

It can be divided in two parts, 121 and 513406, that multiplied together give a palindrome (62122126).

The spelling of 121513406 in words is "one hundred twenty-one million, five hundred thirteen thousand, four hundred six".