3487405 has 4 divisors (see below), whose sum is σ = 4184892. Its totient is φ = 2789920.

The previous prime is 3487403. The next prime is 3487427. The reversal of 3487405 is 5047843.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2735716 + 751689 = 1654^2 + 867^2 .

It is not a de Polignac number, because 3487405 - 2¹ = 3487403 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 (3487403) 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 3 ways as a sum of consecutive naturals, for example, 348736 + ... + 348745.

It is an arithmetic number, because the mean of its divisors is an integer number (1046223).

Almost surely, 2^3487405 is an apocalyptic number.

It is an amenable number.

3487405 is a deficient number, since it is larger than the sum of its proper divisors (697487).

3487405 is an equidigital number, since it uses as much as digits as its factorization.

3487405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697486.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 3487405 is about 1867.4595042463. The cubic root of 3487405 is about 151.6471066565.

The spelling of 3487405 in words is "three million, four hundred eighty-seven thousand, four hundred five".