1195800261 has 4 divisors (see below), whose sum is σ = 1594400352. Its totient is φ = 797200172.

The previous prime is 1195800251. The next prime is 1195800269. The reversal of 1195800261 is 1620085911.

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 1195800261 - 2⁶ = 1195800197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1195800269) 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, 199300041 + ... + 199300046.

It is an arithmetic number, because the mean of its divisors is an integer number (398600088).

Almost surely, 2^1195800261 is an apocalyptic number.

It is an amenable number.

1195800261 is a deficient number, since it is larger than the sum of its proper divisors (398600091).

1195800261 is an equidigital number, since it uses as much as digits as its factorization.

1195800261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398600090.

The product of its (nonzero) digits is 4320, while the sum is 33.

The square root of 1195800261 is about 34580.3450098463. The cubic root of 1195800261 is about 1061.4174288595.

The spelling of 1195800261 in words is "one billion, one hundred ninety-five million, eight hundred thousand, two hundred sixty-one".