4020138425 has 6 divisors (see below), whose sum is σ = 4984971678. Its totient is φ = 3216110720.

The previous prime is 4020138407. The next prime is 4020138439. The reversal of 4020138425 is 5248310204.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1115359609 + 2904778816 = 33397^2 + 53896^2 .

It is not a de Polignac number, because 4020138425 - 2⁸ = 4020138169 is a prime.

It is a super-2 number, since 2×4020138425² = 32323025912322961250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80402744 + ... + 80402793.

It is an arithmetic number, because the mean of its divisors is an integer number (830828613).

Almost surely, 2^4020138425 is an apocalyptic number.

It is an amenable number.

4020138425 is a deficient number, since it is larger than the sum of its proper divisors (964833253).

4020138425 is a wasteful number, since it uses less digits than its factorization.

4020138425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160805547 (or 160805542 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 4020138425 is about 63404.5615472578. The cubic root of 4020138425 is about 1590.0605734871.

Adding to 4020138425 its reverse (5248310204), we get a palindrome (9268448629).

The spelling of 4020138425 in words is "four billion, twenty million, one hundred thirty-eight thousand, four hundred twenty-five".