142337617421 has 4 divisors (see below), whose sum is σ = 146184580092. Its totient is φ = 138490654752.

The previous prime is 142337617379. The next prime is 142337617423. The reversal of 142337617421 is 124716733241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124716733241 = 101 ⋅1234819141.

It can be written as a sum of positive squares in 2 ways, for example, as 104966928196 + 37370689225 = 323986^2 + 193315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142337617421 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 (142337617423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1923481280 + ... + 1923481353.

It is an arithmetic number, because the mean of its divisors is an integer number (36546145023).

Almost surely, 2^142337617421 is an apocalyptic number.

It is an amenable number.

142337617421 is a deficient number, since it is larger than the sum of its proper divisors (3846962671).

142337617421 is an equidigital number, since it uses as much as digits as its factorization.

142337617421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846962670.

The product of its digits is 169344, while the sum is 41.

The spelling of 142337617421 in words is "one hundred forty-two billion, three hundred thirty-seven million, six hundred seventeen thousand, four hundred twenty-one".