121690430 has 16 divisors (see below), whose sum is σ = 224137584. Its totient is φ = 47544000.

The previous prime is 121690427. The next prime is 121690433. The reversal of 121690430 is 34096121.

It is an interprime number because it is at equal distance from previous prime (121690427) and next prime (121690433).

It is a self number, because there is not a number n which added to its sum of digits gives 121690430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121690433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141071 + ... + 141930.

It is an arithmetic number, because the mean of its divisors is an integer number (14008599).

Almost surely, 2^121690430 is an apocalyptic number.

121690430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121690430 is a deficient number, since it is larger than the sum of its proper divisors (102447154).

121690430 is a wasteful number, since it uses less digits than its factorization.

121690430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283051.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 121690430 is about 11031.3385407212. The cubic root of 121690430 is about 495.5477119382.

The spelling of 121690430 in words is "one hundred twenty-one million, six hundred ninety thousand, four hundred thirty".