4001091025 has 12 divisors (see below), whose sum is σ = 4964237452. Its totient is φ = 3199011840.

The previous prime is 4001091023. The next prime is 4001091097. The reversal of 4001091025 is 5201901004.

It can be written as a sum of positive squares in 6 ways, for example, as 761318464 + 3239772561 = 27592^2 + 56919^2 .

It is not a de Polignac number, because 4001091025 - 2¹ = 4001091023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4001090987 and 4001091005.

It is not an unprimeable number, because it can be changed into a prime (4001091023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1824 + ... + 89473.

Almost surely, 2^4001091025 is an apocalyptic number.

It is an amenable number.

4001091025 is a deficient number, since it is larger than the sum of its proper divisors (963146427).

4001091025 is a wasteful number, since it uses less digits than its factorization.

4001091025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93060 (or 93055 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 4001091025 is about 63254.1779252564. The cubic root of 4001091025 is about 1587.5453633678.

Adding to 4001091025 its reverse (5201901004), we get a palindrome (9202992029).

The spelling of 4001091025 in words is "four billion, one million, ninety-one thousand, twenty-five".