742120571887 has 4 divisors (see below), whose sum is σ = 742181101200. Its totient is φ = 742060042576.

The previous prime is 742120571869. The next prime is 742120571953. The reversal of 742120571887 is 788175021247.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 742120571887 - 2³⁹ = 192364757999 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 (742120571867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30246262 + ... + 30270787.

It is an arithmetic number, because the mean of its divisors is an integer number (185545275300).

Almost surely, 2^742120571887 is an apocalyptic number.

742120571887 is a deficient number, since it is larger than the sum of its proper divisors (60529313).

742120571887 is a wasteful number, since it uses less digits than its factorization.

742120571887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60529312.

The product of its (nonzero) digits is 1756160, while the sum is 52.

The spelling of 742120571887 in words is "seven hundred forty-two billion, one hundred twenty million, five hundred seventy-one thousand, eight hundred eighty-seven".