201265609 has 16 divisors (see below), whose sum is σ = 214327296. Its totient is φ = 188701200.

The previous prime is 201265583. The next prime is 201265627. The reversal of 201265609 is 906562102.

It is a cyclic number.

It is not a de Polignac number, because 201265609 - 2²³ = 192877001 is a prime.

It is a super-2 number, since 2×201265609² = 81015690732281762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201265639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155254 + ... + 156544.

It is an arithmetic number, because the mean of its divisors is an integer number (13395456).

Almost surely, 2^201265609 is an apocalyptic number.

It is an amenable number.

201265609 is a deficient number, since it is larger than the sum of its proper divisors (13061687).

201265609 is a wasteful number, since it uses less digits than its factorization.

201265609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 201265609 is about 14186.8110934064. The cubic root of 201265609 is about 586.0345091443.

The spelling of 201265609 in words is "two hundred one million, two hundred sixty-five thousand, six hundred nine".