1242300191691 has 16 divisors (see below), whose sum is σ = 1784587669760. Its totient is φ = 764161564320.

The previous prime is 1242300191683. The next prime is 1242300191711. The reversal of 1242300191691 is 1961910032421.

It is not a de Polignac number, because 1242300191691 - 2³ = 1242300191683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242300191611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6801661 + ... + 6981918.

It is an arithmetic number, because the mean of its divisors is an integer number (111536729360).

Almost surely, 2^{1242300191691} is an apocalyptic number.

1242300191691 is a deficient number, since it is larger than the sum of its proper divisors (542287478069).

1242300191691 is a wasteful number, since it uses less digits than its factorization.

1242300191691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13785906.

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 1242300191691 in words is "one trillion, two hundred forty-two billion, three hundred million, one hundred ninety-one thousand, six hundred ninety-one".