3521431 has 8 divisors (see below), whose sum is σ = 3745440. Its totient is φ = 3299328.

The previous prime is 3521417. The next prime is 3521437. The reversal of 3521431 is 1341253.

3521431 is nontrivially palindromic in base 4.

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 3521431 - 2⁷ = 3521303 is a prime.

It is a super-2 number, since 2×3521431² = 24800952575522, which contains 22 as substring.

3521431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3521399 and 3521408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521437) 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, 5815 + ... + 6391.

It is an arithmetic number, because the mean of its divisors is an integer number (468180).

Almost surely, 2^3521431 is an apocalyptic number.

3521431 is a deficient number, since it is larger than the sum of its proper divisors (224009).

3521431 is a wasteful number, since it uses less digits than its factorization.

3521431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953.

The product of its digits is 360, while the sum is 19.

The square root of 3521431 is about 1876.5476279594. The cubic root of 3521431 is about 152.1387093686.

Adding to 3521431 its reverse (1341253), we get a palindrome (4862684).

It can be divided in two parts, 35214 and 31, that added together give a triangular number (35245 = T₂₆₅).

The spelling of 3521431 in words is "three million, five hundred twenty-one thousand, four hundred thirty-one".