3520247 has 4 divisors (see below), whose sum is σ = 3572856. Its totient is φ = 3467640.

The previous prime is 3520243. The next prime is 3520261. The reversal of 3520247 is 7420253.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3520247 - 2² = 3520243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520243) 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, 26204 + ... + 26337.

It is an arithmetic number, because the mean of its divisors is an integer number (893214).

Almost surely, 2^3520247 is an apocalyptic number.

3520247 is a deficient number, since it is larger than the sum of its proper divisors (52609).

3520247 is an equidigital number, since it uses as much as digits as its factorization.

3520247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52608.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 3520247 is about 1876.2321284958. The cubic root of 3520247 is about 152.1216564126.

It can be divided in two parts, 35 and 20247, that multiplied together give a triangular number (708645 = T₁₁₉₀).

The spelling of 3520247 in words is "three million, five hundred twenty thousand, two hundred forty-seven".