142191604 has 12 divisors (see below), whose sum is σ = 263472804. Its totient is φ = 66913664.

The previous prime is 142191601. The next prime is 142191619. The reversal of 142191604 is 406191241.

It can be written as a sum of positive squares in 2 ways, for example, as 38192400 + 103999204 = 6180^2 + 10198^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142191601) 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, 1045459 + ... + 1045594.

It is an arithmetic number, because the mean of its divisors is an integer number (21956067).

Almost surely, 2^142191604 is an apocalyptic number.

It is an amenable number.

142191604 is a deficient number, since it is larger than the sum of its proper divisors (121281200).

142191604 is a wasteful number, since it uses less digits than its factorization.

142191604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091074 (or 2091072 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 142191604 is about 11924.4121029089. The cubic root of 142191604 is about 521.9448912527.

It can be divided in two parts, 1421 and 91604, that added together give a square (93025 = 305²).

The spelling of 142191604 in words is "one hundred forty-two million, one hundred ninety-one thousand, six hundred four".