121639434 has 32 divisors (see below), whose sum is σ = 279085056. Its totient is φ = 34622640.

The previous prime is 121639417. The next prime is 121639439. The reversal of 121639434 is 434936121.

It is a super-4 number, since 4×121639434⁴ (a number of 33 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121639395 and 121639404.

It is not an unprimeable number, because it can be changed into a prime (121639439) 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, 6039 + ... + 16725.

It is an arithmetic number, because the mean of its divisors is an integer number (8721408).

Almost surely, 2^121639434 is an apocalyptic number.

121639434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121639434 is an abundant number, since it is smaller than the sum of its proper divisors (157445622).

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

121639434 is a wasteful number, since it uses less digits than its factorization.

121639434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10970.

The product of its digits is 15552, while the sum is 33.

The square root of 121639434 is about 11029.0268836376. The cubic root of 121639434 is about 495.4784803041.

The spelling of 121639434 in words is "one hundred twenty-one million, six hundred thirty-nine thousand, four hundred thirty-four".