1158642140421 has 8 divisors (see below), whose sum is σ = 1548633343360. Its totient is φ = 770539515552.

The previous prime is 1158642140401. The next prime is 1158642140431. The reversal of 1158642140421 is 1240412468511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1158642140421 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 1158642140421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158642140401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472143085 + ... + 472145538.

It is an arithmetic number, because the mean of its divisors is an integer number (193579167920).

Almost surely, 2^{1158642140421} is an apocalyptic number.

It is an amenable number.

1158642140421 is a deficient number, since it is larger than the sum of its proper divisors (389991202939).

1158642140421 is an equidigital number, since it uses as much as digits as its factorization.

1158642140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944289035.

The product of its (nonzero) digits is 61440, while the sum is 39.

The spelling of 1158642140421 in words is "one trillion, one hundred fifty-eight billion, six hundred forty-two million, one hundred forty thousand, four hundred twenty-one".