121429647 has 6 divisors (see below), whose sum is σ = 175398392. Its totient is φ = 80953092.

The previous prime is 121429643. The next prime is 121429663. The reversal of 121429647 is 746924121.

It is a happy number.

121429647 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 2 + 9 + 647 = 666.

It is not a de Polignac number, because 121429647 - 2² = 121429643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121429643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6746083 + ... + 6746100.

Almost surely, 2^121429647 is an apocalyptic number.

121429647 is a deficient number, since it is larger than the sum of its proper divisors (53968745).

121429647 is a wasteful number, since it uses less digits than its factorization.

121429647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13492189 (or 13492186 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 121429647 is about 11019.5121035371. The cubic root of 121429647 is about 495.1934719683.

The spelling of 121429647 in words is "one hundred twenty-one million, four hundred twenty-nine thousand, six hundred forty-seven".