4020491225 has 24 divisors (see below), whose sum is σ = 5216820120. Its totient is φ = 3070379520.

The previous prime is 4020491141. The next prime is 4020491309. The reversal of 4020491225 is 5221940204.

It is an interprime number because it is at equal distance from previous prime (4020491141) and next prime (4020491309).

It can be written as a sum of positive squares in 12 ways, for example, as 41783296 + 3978707929 = 6464^2 + 63077^2 .

It is not a de Polignac number, because 4020491225 - 2¹² = 4020487129 is a prime.

It is a super-3 number, since 3×4020491225³ (a number of 30 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8021 + ... + 90029.

It is an arithmetic number, because the mean of its divisors is an integer number (217367505).

Almost surely, 2^4020491225 is an apocalyptic number.

It is an amenable number.

4020491225 is a deficient number, since it is larger than the sum of its proper divisors (1196328895).

4020491225 is a wasteful number, since it uses less digits than its factorization.

4020491225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82109 (or 82104 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 4020491225 is about 63407.3436204356. The cubic root of 4020491225 is about 1590.1070857297.

The spelling of 4020491225 in words is "four billion, twenty million, four hundred ninety-one thousand, two hundred twenty-five".