201261409 has 4 divisors (see below), whose sum is σ = 201314304. Its totient is φ = 201208516.

The previous prime is 201261397. The next prime is 201261413. The reversal of 201261409 is 904162102.

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.

It is a cyclic number.

It is not a de Polignac number, because 201261409 - 2⁵ = 201261377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201261469) 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, 20257 + ... + 28510.

It is an arithmetic number, because the mean of its divisors is an integer number (50328576).

Almost surely, 2^201261409 is an apocalyptic number.

It is an amenable number.

201261409 is a deficient number, since it is larger than the sum of its proper divisors (52895).

201261409 is an equidigital number, since it uses as much as digits as its factorization.

201261409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52894.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 201261409 is about 14186.6630678254. The cubic root of 201261409 is about 586.0304326704.

The spelling of 201261409 in words is "two hundred one million, two hundred sixty-one thousand, four hundred nine".