396106261 has 4 divisors (see below), whose sum is σ = 396152224. Its totient is φ = 396060300.

The previous prime is 396106241. The next prime is 396106267. The reversal of 396106261 is 162601693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 162601693 = 2131 ⋅76303.

It is a 3-Lehmer number, since φ(396106261) divides (396106261-1)³.

It is a cyclic number.

It is not a de Polignac number, because 396106261 - 2⁵ = 396106229 is a prime.

It is a deceptive number, since it divides R_396106260.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396106267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5745 + ... + 28726.

It is an arithmetic number, because the mean of its divisors is an integer number (99038056).

Almost surely, 2^396106261 is an apocalyptic number.

396106261 is the 11491-st octagonal number.

It is an amenable number.

396106261 is a deficient number, since it is larger than the sum of its proper divisors (45963).

396106261 is a wasteful number, since it uses less digits than its factorization.

396106261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45962.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 396106261 is about 19902.4184711306. The cubic root of 396106261 is about 734.4077237653.

The spelling of 396106261 in words is "three hundred ninety-six million, one hundred six thousand, two hundred sixty-one".