4012123140 has 72 divisors (see below), whose sum is σ = 12176138520. Its totient is φ = 1069369344.

The previous prime is 4012123111. The next prime is 4012123147. The reversal of 4012123140 is 413212104.

4012123140 is a `hidden beast` number, since 401 + 2 + 123 + 140 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1297296324 + 2714826816 = 36018^2 + 52104^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (4012123147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474066 + ... + 482454.

It is an arithmetic number, because the mean of its divisors is an integer number (169113035).

Almost surely, 2^4012123140 is an apocalyptic number.

It is an amenable number.

4012123140 is an abundant number, since it is smaller than the sum of its proper divisors (8164015380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4012123140 is a wasteful number, since it uses less digits than its factorization.

4012123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11061 (or 11056 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 4012123140 is about 63341.3225311881. The cubic root of 4012123140 is about 1589.0031249761.

Adding to 4012123140 its reverse (413212104), we get a palindrome (4425335244).

The spelling of 4012123140 in words is "four billion, twelve million, one hundred twenty-three thousand, one hundred forty".