121851434 has 8 divisors (see below), whose sum is σ = 187717188. Its totient is φ = 59279040.

The previous prime is 121851377. The next prime is 121851439. The reversal of 121851434 is 434158121.

It can be written as a sum of positive squares in 2 ways, for example, as 114425809 + 7425625 = 10697^2 + 2725^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 121851397 and 121851406.

It is not an unprimeable number, because it can be changed into a prime (121851439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823247 + ... + 823394.

Almost surely, 2^121851434 is an apocalyptic number.

121851434 is a deficient number, since it is larger than the sum of its proper divisors (65865754).

121851434 is a wasteful number, since it uses less digits than its factorization.

121851434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646680.

The product of its digits is 3840, while the sum is 29.

The square root of 121851434 is about 11038.6337016861. The cubic root of 121851434 is about 495.7661624297.

The spelling of 121851434 in words is "one hundred twenty-one million, eight hundred fifty-one thousand, four hundred thirty-four".