4001012 has 6 divisors (see below), whose sum is σ = 7001778. Its totient is φ = 2000504.

The previous prime is 4001009. The next prime is 4001017. The reversal of 4001012 is 2101004.

It can be written as a sum of positive squares in only one way, i.e., 3519376 + 481636 = 1876^2 + 694^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500123 + ... + 500130.

It is an arithmetic number, because the mean of its divisors is an integer number (1166963).

Almost surely, 2^4001012 is an apocalyptic number.

It is an amenable number.

4001012 is a deficient number, since it is larger than the sum of its proper divisors (3000766).

4001012 is a wasteful number, since it uses less digits than its factorization.

4001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000257 (or 1000255 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 4001012 is about 2000.2529839998. The cubic root of 4001012 is about 158.7534911502.

Adding to 4001012 its reverse (2101004), we get a palindrome (6102016).

The spelling of 4001012 in words is "four million, one thousand, twelve".