40161025 has 12 divisors (see below), whose sum is σ = 49888300. Its totient is φ = 32071680.

The previous prime is 40161019. The next prime is 40161031. The reversal of 40161025 is 52016104.

It is an interprime number because it is at equal distance from previous prime (40161019) and next prime (40161031).

It can be written as a sum of positive squares in 6 ways, for example, as 16129 + 40144896 = 127^2 + 6336^2 .

It is a de Polignac number, because none of the positive numbers 2^k-40161025 is a prime.

It is a super-2 number, since 2×40161025² = 3225815858101250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40160993 and 40161011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18181 + ... + 20269.

Almost surely, 2^40161025 is an apocalyptic number.

It is an amenable number.

40161025 is a deficient number, since it is larger than the sum of its proper divisors (9727275).

40161025 is a wasteful number, since it uses less digits than its factorization.

40161025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868 (or 2863 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 40161025 is about 6337.2726783688. The cubic root of 40161025 is about 342.4534896973.

Adding to 40161025 its reverse (52016104), we get a palindrome (92177129).

It can be divided in two parts, 4016 and 1025, that added together give a square (5041 = 71²).

The spelling of 40161025 in words is "forty million, one hundred sixty-one thousand, twenty-five".