121240434 has 32 divisors (see below), whose sum is σ = 277447680. Its totient is φ = 34599312.

The previous prime is 121240409. The next prime is 121240439. The reversal of 121240434 is 434042121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 121240434.

It is not an unprimeable number, because it can be changed into a prime (121240439) 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, 67107 + ... + 68889.

It is an arithmetic number, because the mean of its divisors is an integer number (8670240).

Almost surely, 2^121240434 is an apocalyptic number.

121240434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121240434 is an abundant number, since it is smaller than the sum of its proper divisors (156207246).

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

121240434 is a wasteful number, since it uses less digits than its factorization.

121240434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 121240434 is about 11010.9233945206. The cubic root of 121240434 is about 494.9361329700.

Adding to 121240434 its reverse (434042121), we get a palindrome (555282555).

The spelling of 121240434 in words is "one hundred twenty-one million, two hundred forty thousand, four hundred thirty-four".