121429 has 16 divisors (see below), whose sum is σ = 161280. Its totient is φ = 88560.

The previous prime is 121421. The next prime is 121439. The reversal of 121429 is 924121.

121429 = T₇ + T₈ + ... + T₈₉.

It is a cyclic number.

It is not a de Polignac number, because 121429 - 2³ = 121421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121421) 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, 1422 + ... + 1504.

It is an arithmetic number, because the mean of its divisors is an integer number (10080).

2¹²¹⁴²⁹ is an apocalyptic number.

121429 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

121429 is a deficient number, since it is larger than the sum of its proper divisors (39851).

121429 is a wasteful number, since it uses less digits than its factorization.

121429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120.

The product of its digits is 144, while the sum is 19.

The square root of 121429 is about 348.4666411581. The cubic root of 121429 is about 49.5192592472.

It can be divided in two parts, 12142 and 9, that multiplied together give a triangular number (109278 = T₄₆₇).

The spelling of 121429 in words is "one hundred twenty-one thousand, four hundred twenty-nine".