1012740191 has 4 divisors (see below), whose sum is σ = 1012815000. Its totient is φ = 1012665384.

The previous prime is 1012740107. The next prime is 1012740193. The reversal of 1012740191 is 1910472101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1910472101 = 449 ⋅4254949.

It is a cyclic number.

It is not a de Polignac number, because 1012740191 - 2²⁶ = 945631327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012740191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012740193) 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 3 ways as a sum of consecutive naturals, for example, 10781 + ... + 46278.

It is an arithmetic number, because the mean of its divisors is an integer number (253203750).

Almost surely, 2^1012740191 is an apocalyptic number.

1012740191 is a deficient number, since it is larger than the sum of its proper divisors (74809).

1012740191 is an equidigital number, since it uses as much as digits as its factorization.

1012740191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74808.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1012740191 is about 31823.5791670265. The cubic root of 1012740191 is about 1004.2288221883.

The spelling of 1012740191 in words is "one billion, twelve million, seven hundred forty thousand, one hundred ninety-one".