3630521 has 2 divisors, whose sum is σ = 3630522. Its totient is φ = 3630520.

The previous prime is 3630461. The next prime is 3630547. The reversal of 3630521 is 1250363.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3474496 + 156025 = 1864^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 3630521 - 2¹⁴ = 3614137 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 3630493 and 3630502.

It is not a weakly prime, because it can be changed into another prime (3630821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1815260 + 1815261.

It is an arithmetic number, because the mean of its divisors is an integer number (1815261).

Almost surely, 2^3630521 is an apocalyptic number.

It is an amenable number.

3630521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3630521 is an equidigital number, since it uses as much as digits as its factorization.

3630521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 3630521 is about 1905.3926104612. The cubic root of 3630521 is about 153.6937891330.

Adding to 3630521 its reverse (1250363), we get a palindrome (4880884).

The spelling of 3630521 in words is "three million, six hundred thirty thousand, five hundred twenty-one".