142603421 has 4 divisors (see below), whose sum is σ = 144941244. Its totient is φ = 140265600.

The previous prime is 142603399. The next prime is 142603457. The reversal of 142603421 is 124306241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48804196 + 93799225 = 6986^2 + 9685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142603421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142603621) 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, 1168820 + ... + 1168941.

It is an arithmetic number, because the mean of its divisors is an integer number (36235311).

Almost surely, 2^142603421 is an apocalyptic number.

It is an amenable number.

142603421 is a deficient number, since it is larger than the sum of its proper divisors (2337823).

142603421 is an equidigital number, since it uses as much as digits as its factorization.

142603421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337822.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 142603421 is about 11941.6674296348. The cubic root of 142603421 is about 522.4482932281.

Adding to 142603421 its reverse (124306241), we get a palindrome (266909662).

The spelling of 142603421 in words is "one hundred forty-two million, six hundred three thousand, four hundred twenty-one".