3647481 has 4 divisors (see below), whose sum is σ = 4863312. Its totient is φ = 2431652.

The previous prime is 3647477. The next prime is 3647489. The reversal of 3647481 is 1847463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1847463 = 3 ⋅615821.

It is a cyclic number.

It is not a de Polignac number, because 3647481 - 2² = 3647477 is a prime.

It is a super-2 number, since 2×3647481² = 26608235290722, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3647489) 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, 607911 + ... + 607916.

It is an arithmetic number, because the mean of its divisors is an integer number (1215828).

Almost surely, 2^3647481 is an apocalyptic number.

It is an amenable number.

3647481 is a deficient number, since it is larger than the sum of its proper divisors (1215831).

3647481 is a wasteful number, since it uses less digits than its factorization.

3647481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215830.

The product of its digits is 16128, while the sum is 33.

The square root of 3647481 is about 1909.8379512409. The cubic root of 3647481 is about 153.9327445683.

The spelling of 3647481 in words is "three million, six hundred forty-seven thousand, four hundred eighty-one".