921040129 has 8 divisors (see below), whose sum is σ = 964664640. Its totient is φ = 877713936.

The previous prime is 921040121. The next prime is 921040151.

It is a happy number.

921040129 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 921040129 - 2³ = 921040121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 921040097 and 921040106.

It is not an unprimeable number, because it can be changed into a prime (921040121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68247 + ... + 80620.

It is an arithmetic number, because the mean of its divisors is an integer number (120583080).

Almost surely, 2^921040129 is an apocalyptic number.

It is an amenable number.

921040129 is a deficient number, since it is larger than the sum of its proper divisors (43624511).

921040129 is a wasteful number, since it uses less digits than its factorization.

921040129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149159.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 921040129 is about 30348.6429515390. The cubic root of 921040129 is about 972.9552163804.

The spelling of 921040129 in words is "nine hundred twenty-one million, forty thousand, one hundred twenty-nine".