4090242025 has 9 divisors (see below), whose sum is σ = 5072296663. Its totient is φ = 3271937800.

The previous prime is 4090242019. The next prime is 4090242031. The reversal of 4090242025 is 5202420904.

The square root of 4090242025 is 63955.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (4090242019) and next prime (4090242031).

It can be written as a sum of positive squares in only one way, i.e., 1472487129 + 2617754896 = 38373^2 + 51164^2 .

It is not a de Polignac number, because 4090242025 - 2³ = 4090242017 is a prime.

It is a super-2 number, since 2×4090242025² = 33460159646152201250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4090241984 and 4090242002.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 313380 + ... + 326170.

Almost surely, 2^4090242025 is an apocalyptic number.

4090242025 is the 63955-th square number.

4090242025 is the 31978-th centered octagonal number.

It is an amenable number.

4090242025 is a deficient number, since it is larger than the sum of its proper divisors (982054638).

4090242025 is an frugal number, since it uses more digits than its factorization.

4090242025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25592 (or 12796 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The cubic root of 4090242025 is about 1599.2499120819.

Adding to 4090242025 its reverse (5202420904), we get a palindrome (9292662929).

The spelling of 4090242025 in words is "four billion, ninety million, two hundred forty-two thousand, twenty-five".