142023401 has 4 divisors (see below), whose sum is σ = 152948292. Its totient is φ = 131098512.

The previous prime is 142023397. The next prime is 142023439. The reversal of 142023401 is 104320241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104320241 = 19 ⋅5490539.

It can be written as a sum of positive squares in 2 ways, for example, as 68475625 + 73547776 = 8275^2 + 8576^2 .

It is a cyclic number.

It is not a de Polignac number, because 142023401 - 2² = 142023397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142023401.

It is not an unprimeable number, because it can be changed into a prime (142023481) 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, 5462426 + ... + 5462451.

It is an arithmetic number, because the mean of its divisors is an integer number (38237073).

Almost surely, 2^142023401 is an apocalyptic number.

It is an amenable number.

142023401 is a deficient number, since it is larger than the sum of its proper divisors (10924891).

142023401 is a wasteful number, since it uses less digits than its factorization.

142023401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10924890.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 142023401 is about 11917.3571315120. The cubic root of 142023401 is about 521.7390016070.

Adding to 142023401 its reverse (104320241), we get a palindrome (246343642).

The spelling of 142023401 in words is "one hundred forty-two million, twenty-three thousand, four hundred one".