142402021 has 8 divisors (see below), whose sum is σ = 145553184. Its totient is φ = 139285200.

The previous prime is 142402019. The next prime is 142402027. The reversal of 142402021 is 120204241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142402021 - 2¹ = 142402019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142401986 and 142402004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142402027) 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, 111 + ... + 16876.

It is an arithmetic number, because the mean of its divisors is an integer number (18194148).

Almost surely, 2^142402021 is an apocalyptic number.

It is an amenable number.

142402021 is a deficient number, since it is larger than the sum of its proper divisors (3151163).

142402021 is a wasteful number, since it uses less digits than its factorization.

142402021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17171.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 142402021 is about 11933.2317919330. The cubic root of 142402021 is about 522.2022246572.

Adding to 142402021 its reverse (120204241), we get a palindrome (262606262).

It can be divided in two parts, 14240 and 2021, that added together give a palindrome (16261).

The spelling of 142402021 in words is "one hundred forty-two million, four hundred two thousand, twenty-one".