1191252247405 has 16 divisors (see below), whose sum is σ = 1559481430464. Its totient is φ = 866351969280.

The previous prime is 1191252247343. The next prime is 1191252247411. The reversal of 1191252247405 is 5047422521911.

It is not a de Polignac number, because 1191252247405 - 2⁹ = 1191252246893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4767514 + ... + 5011156.

It is an arithmetic number, because the mean of its divisors is an integer number (97467589404).

Almost surely, 2^{1191252247405} is an apocalyptic number.

It is an amenable number.

1191252247405 is a deficient number, since it is larger than the sum of its proper divisors (368229183059).

1191252247405 is a wasteful number, since it uses less digits than its factorization.

1191252247405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332556.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 1191252247405 in words is "one trillion, one hundred ninety-one billion, two hundred fifty-two million, two hundred forty-seven thousand, four hundred five".