1190811061 has 4 divisors (see below), whose sum is σ = 1299066624. Its totient is φ = 1082555500.

The previous prime is 1190810981. The next prime is 1190811067. The reversal of 1190811061 is 1601180911.

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 1190811061 - 2⁹ = 1190810549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1190811067) 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, 54127765 + ... + 54127786.

It is an arithmetic number, because the mean of its divisors is an integer number (324766656).

Almost surely, 2^1190811061 is an apocalyptic number.

1190811061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1190811061 is a deficient number, since it is larger than the sum of its proper divisors (108255563).

1190811061 is a wasteful number, since it uses less digits than its factorization.

1190811061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108255562.

The product of its (nonzero) digits is 432, while the sum is 28.

The square root of 1190811061 is about 34508.1303608295. The cubic root of 1190811061 is about 1059.9391981857.

Adding to 1190811061 its reverse (1601180911), we get a palindrome (2791991972).

The spelling of 1190811061 in words is "one billion, one hundred ninety million, eight hundred eleven thousand, sixty-one".