121872435 has 16 divisors (see below), whose sum is σ = 195471360. Its totient is φ = 64840160.

The previous prime is 121872433. The next prime is 121872437. The reversal of 121872435 is 534278121.

It is an interprime number because it is at equal distance from previous prime (121872433) and next prime (121872437).

It is not a de Polignac number, because 121872435 - 2¹ = 121872433 is a prime.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 121872396 and 121872405.

It is not an unprimeable number, because it can be changed into a prime (121872433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3411 + ... + 15980.

It is an arithmetic number, because the mean of its divisors is an integer number (12216960).

Almost surely, 2^121872435 is an apocalyptic number.

121872435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121872435 is a deficient number, since it is larger than the sum of its proper divisors (73598925).

121872435 is a wasteful number, since it uses less digits than its factorization.

121872435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19818.

The product of its digits is 13440, while the sum is 33.

The square root of 121872435 is about 11039.5849106749. The cubic root of 121872435 is about 495.7946424313.

The spelling of 121872435 in words is "one hundred twenty-one million, eight hundred seventy-two thousand, four hundred thirty-five".