142399444 has 24 divisors (see below), whose sum is σ = 273849408. Its totient is φ = 64251840.

The previous prime is 142399441. The next prime is 142399447. The reversal of 142399444 is 444993241.

It is an interprime number because it is at equal distance from previous prime (142399441) and next prime (142399447).

It is a junction number, because it is equal to n+sod(n) for n = 142399397 and 142399406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142399441) 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, 5784 + ... + 17839.

It is an arithmetic number, because the mean of its divisors is an integer number (11410392).

Almost surely, 2^142399444 is an apocalyptic number.

It is an amenable number.

142399444 is a deficient number, since it is larger than the sum of its proper divisors (131449964).

142399444 is a wasteful number, since it uses less digits than its factorization.

142399444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23775 (or 23773 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 142399444 is about 11933.1238156654. The cubic root of 142399444 is about 522.1990746006.

The spelling of 142399444 in words is "one hundred forty-two million, three hundred ninety-nine thousand, four hundred forty-four".