3921429 has 16 divisors (see below), whose sum is σ = 5572800. Its totient is φ = 2445696.

The previous prime is 3921413. The next prime is 3921451. The reversal of 3921429 is 9241293.

3921429 = T₉₂₉ + T₉₃₀ + ... + T₉₃₇.

It is not a de Polignac number, because 3921429 - 2⁴ = 3921413 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3921396 and 3921405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4687 + ... + 5459.

It is an arithmetic number, because the mean of its divisors is an integer number (348300).

Almost surely, 2^3921429 is an apocalyptic number.

It is an amenable number.

3921429 is a deficient number, since it is larger than the sum of its proper divisors (1651371).

3921429 is a wasteful number, since it uses less digits than its factorization.

3921429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884.

The product of its digits is 3888, while the sum is 30.

The square root of 3921429 is about 1980.2598314363. The cubic root of 3921429 is about 157.6938605561.

The spelling of 3921429 in words is "three million, nine hundred twenty-one thousand, four hundred twenty-nine".