121434140 has 24 divisors (see below), whose sum is σ = 258606432. Its totient is φ = 47888960.

The previous prime is 121434109. The next prime is 121434151. The reversal of 121434140 is 41434121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41339 + ... + 44178.

It is an arithmetic number, because the mean of its divisors is an integer number (10775268).

Almost surely, 2^121434140 is an apocalyptic number.

121434140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121434140 is an abundant number, since it is smaller than the sum of its proper divisors (137172292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121434140 is a wasteful number, since it uses less digits than its factorization.

121434140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85597 (or 85595 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 121434140 is about 11019.7159673015. The cubic root of 121434140 is about 495.1995794193.

Adding to 121434140 its reverse (41434121), we get a palindrome (162868261).

It can be divided in two parts, 1214 and 34140, that multiplied together give a triangular number (41445960 = T₉₁₀₄).

The spelling of 121434140 in words is "one hundred twenty-one million, four hundred thirty-four thousand, one hundred forty".