3521429 has 4 divisors (see below), whose sum is σ = 3525900. Its totient is φ = 3516960.

The previous prime is 3521417. The next prime is 3521437. The reversal of 3521429 is 9241253.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 722500 + 2798929 = 850^2 + 1673^2 .

It is a cyclic number.

It is not a de Polignac number, because 3521429 - 2⁸ = 3521173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3521398 and 3521407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704 + ... + 2745.

It is an arithmetic number, because the mean of its divisors is an integer number (881475).

Almost surely, 2^3521429 is an apocalyptic number.

It is an amenable number.

3521429 is a deficient number, since it is larger than the sum of its proper divisors (4471).

3521429 is a wasteful number, since it uses less digits than its factorization.

3521429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470.

The product of its digits is 2160, while the sum is 26.

The square root of 3521429 is about 1876.5470950658. The cubic root of 3521429 is about 152.1386805662.

The spelling of 3521429 in words is "three million, five hundred twenty-one thousand, four hundred twenty-nine".