4020142655 has 4 divisors (see below), whose sum is σ = 4824171192. Its totient is φ = 3216114120.

The previous prime is 4020142639. The next prime is 4020142657. The reversal of 4020142655 is 5562410204.

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

It is not a de Polignac number, because 4020142655 - 2⁴ = 4020142639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020142657) 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, 402014261 + ... + 402014270.

It is an arithmetic number, because the mean of its divisors is an integer number (1206042798).

Almost surely, 2^4020142655 is an apocalyptic number.

4020142655 is a deficient number, since it is larger than the sum of its proper divisors (804028537).

4020142655 is an equidigital number, since it uses as much as digits as its factorization.

4020142655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804028536.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 4020142655 is about 63404.5949044704. The cubic root of 4020142655 is about 1590.0611311755.

Adding to 4020142655 its reverse (5562410204), we get a palindrome (9582552859).

The spelling of 4020142655 in words is "four billion, twenty million, one hundred forty-two thousand, six hundred fifty-five".