1199251061 has 4 divisors (see below), whose sum is σ = 1211614572. Its totient is φ = 1186887552.

The previous prime is 1199251021. The next prime is 1199251099. The reversal of 1199251061 is 1601529911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1601529911 = 199 ⋅8047889.

It can be written as a sum of positive squares in 2 ways, for example, as 542610436 + 656640625 = 23294^2 + 25625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1199251061 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 (1199251021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6181610 + ... + 6181803.

It is an arithmetic number, because the mean of its divisors is an integer number (302903643).

Almost surely, 2^1199251061 is an apocalyptic number.

It is an amenable number.

1199251061 is a deficient number, since it is larger than the sum of its proper divisors (12363511).

1199251061 is an equidigital number, since it uses as much as digits as its factorization.

1199251061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12363510.

The product of its (nonzero) digits is 4860, while the sum is 35.

The square root of 1199251061 is about 34630.2044608460. The cubic root of 1199251061 is about 1062.4374491619.

The spelling of 1199251061 in words is "one billion, one hundred ninety-nine million, two hundred fifty-one thousand, sixty-one".