4129990225 has 9 divisors (see below), whose sum is σ = 5121586353.
Its totient is φ = 3303735120.
The previous prime is 4129990223. The next prime is 4129990237. The reversal of 4129990225 is 5220999214.
The square root of 4129990225 is 64265.
It is a perfect power (a square), and thus also a powerful number.
4129990225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in 4 ways, for example, as 656538129 + 3473452096 = 25623^2 + 58936^2
It is not a de Polignac number, because 4129990225 - 21 = 4129990223 is a prime.
It is a super-3 number, since 3×41299902253 (a number of 30 digits) contains 333 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (4129990223) by changing a digit.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 314899 + ... + 327751.
Almost surely, 24129990225 is an apocalyptic number.
4129990225 is the 64265-th square number.
4129990225 is the 32133-rd centered octagonal number.
It is an amenable number.
4129990225 is a deficient number, since it is larger than the sum of its proper divisors (991596128).
4129990225 is an frugal number, since it uses more digits than its factorization.
4129990225 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 25716 (or 12858 counting only the distinct ones).
The product of its (nonzero) digits is 116640, while the sum is 43.
The cubic root of 4129990225 is about 1604.4136243022.
The spelling of 4129990225 in words is "four billion, one hundred twenty-nine million, nine hundred ninety thousand, two hundred twenty-five".