3958261 has 2 divisors, whose sum is σ = 3958262. Its totient is φ = 3958260.

The previous prime is 3958259. The next prime is 3958313. The reversal of 3958261 is 1628593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3591025 + 367236 = 1895^2 + 606^2 .

It is an emirp because it is prime and its reverse (1628593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3958261 - 2¹ = 3958259 is a prime.

Together with 3958259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3958211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979130 + 1979131.

It is an arithmetic number, because the mean of its divisors is an integer number (1979131).

Almost surely, 2^3958261 is an apocalyptic number.

It is an amenable number.

3958261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3958261 is an equidigital number, since it uses as much as digits as its factorization.

3958261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 3958261 is about 1989.5378860429. The cubic root of 3958261 is about 158.1860357415.

The spelling of 3958261 in words is "three million, nine hundred fifty-eight thousand, two hundred sixty-one".