3607521 has 4 divisors (see below), whose sum is σ = 4810032. Its totient is φ = 2405012.

The previous prime is 3607517. The next prime is 3607523. The reversal of 3607521 is 1257063.

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.

It is a cyclic number.

It is not a de Polignac number, because 3607521 - 2² = 3607517 is a prime.

It is a D-number.

3607521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3607491 and 3607500.

It is not an unprimeable number, because it can be changed into a prime (3607523) 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, 601251 + ... + 601256.

It is an arithmetic number, because the mean of its divisors is an integer number (1202508).

Almost surely, 2^3607521 is an apocalyptic number.

It is an amenable number.

3607521 is a deficient number, since it is larger than the sum of its proper divisors (1202511).

3607521 is a wasteful number, since it uses less digits than its factorization.

3607521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202510.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 3607521 is about 1899.3475195445. The cubic root of 3607521 is about 153.3685421142.

The spelling of 3607521 in words is "three million, six hundred seven thousand, five hundred twenty-one".