121434555 has 32 divisors (see below), whose sum is σ = 217698048. Its totient is φ = 57283200.

The previous prime is 121434541. The next prime is 121434559. The reversal of 121434555 is 555434121.

It is not a de Polignac number, because 121434555 - 2⁴ = 121434539 is a prime.

It is a super-2 number, since 2×121434555² = 29492702296096050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121434559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3841 + ... + 16050.

It is an arithmetic number, because the mean of its divisors is an integer number (6803064).

Almost surely, 2^121434555 is an apocalyptic number.

121434555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121434555 is a deficient number, since it is larger than the sum of its proper divisors (96263493).

121434555 is a wasteful number, since it uses less digits than its factorization.

121434555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19947.

The product of its digits is 12000, while the sum is 30.

The square root of 121434555 is about 11019.7347971718. The cubic root of 121434555 is about 495.2001435319.

Adding to 121434555 its reverse (555434121), we get a palindrome (676868676).

The spelling of 121434555 in words is "one hundred twenty-one million, four hundred thirty-four thousand, five hundred fifty-five".