3261553 has 2 divisors, whose sum is σ = 3261554. Its totient is φ = 3261552.

The previous prime is 3261551. The next prime is 3261581. The reversal of 3261553 is 3551623.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2934369 + 327184 = 1713^2 + 572^2 .

It is a cyclic number.

It is not a de Polignac number, because 3261553 - 2¹ = 3261551 is a prime.

Together with 3261551, it forms a pair of twin primes.

3261553 is a lucky number.

It is equal to p₂₃₄₃₅₈ and since 3261553 and 234358 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3261551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630776 + 1630777.

It is an arithmetic number, because the mean of its divisors is an integer number (1630777).

Almost surely, 2^3261553 is an apocalyptic number.

It is an amenable number.

3261553 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261553 is an equidigital number, since it uses as much as digits as its factorization.

3261553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 25.

The square root of 3261553 is about 1805.9770208948. The cubic root of 3261553 is about 148.3001123544.

The spelling of 3261553 in words is "three million, two hundred sixty-one thousand, five hundred fifty-three".