3652421 has 2 divisors, whose sum is σ = 3652422. Its totient is φ = 3652420.

The previous prime is 3652391. The next prime is 3652447. The reversal of 3652421 is 1242563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3568321 + 84100 = 1889^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 3652421 - 2⁶ = 3652357 is a prime.

It is a super-2 number, since 2×3652421² = 26680358322482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3654421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1826210 + 1826211.

It is an arithmetic number, because the mean of its divisors is an integer number (1826211).

Almost surely, 2^3652421 is an apocalyptic number.

It is an amenable number.

3652421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3652421 is an equidigital number, since it uses as much as digits as its factorization.

3652421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 3652421 is about 1911.1308170819. The cubic root of 3652421 is about 154.0022066362.

Adding to 3652421 its reverse (1242563), we get a palindrome (4894984).

The spelling of 3652421 in words is "three million, six hundred fifty-two thousand, four hundred twenty-one".