32661257 has 2 divisors, whose sum is σ = 32661258. Its totient is φ = 32661256.

The previous prime is 32661229. The next prime is 32661263. The reversal of 32661257 is 75216623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29637136 + 3024121 = 5444^2 + 1739^2 .

It is an emirp because it is prime and its reverse (75216623) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32661257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (32661217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16330628 + 16330629.

It is an arithmetic number, because the mean of its divisors is an integer number (16330629).

Almost surely, 2^32661257 is an apocalyptic number.

It is an amenable number.

32661257 is a deficient number, since it is larger than the sum of its proper divisors (1).

32661257 is an equidigital number, since it uses as much as digits as its factorization.

32661257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 32661257 is about 5715.0027996494. The cubic root of 32661257 is about 319.6521513129.

Subtracting from 32661257 its sum of digits (32), we obtain a square (32661225 = 5715²).

The spelling of 32661257 in words is "thirty-two million, six hundred sixty-one thousand, two hundred fifty-seven".