20251225 has 6 divisors (see below), whose sum is σ = 25111550. Its totient is φ = 16200960.

The previous prime is 20251223. The next prime is 20251229. The reversal of 20251225 is 52215202.

It can be written as a sum of positive squares in 3 ways, for example, as 7139584 + 13111641 = 2672^2 + 3621^2 .

It is not a de Polignac number, because 20251225 - 2¹ = 20251223 is a prime.

It is a super-2 number, since 2×20251225² = 820224228001250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20251223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 405000 + ... + 405049.

Almost surely, 2^20251225 is an apocalyptic number.

20251225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20251225 is a deficient number, since it is larger than the sum of its proper divisors (4860325).

20251225 is an equidigital number, since it uses as much as digits as its factorization.

20251225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810059 (or 810054 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20251225 is about 4500.1361090527. The cubic root of 20251225 is about 272.5735850429.

Adding to 20251225 its reverse (52215202), we get a palindrome (72466427).

It can be divided in two parts, 2025 and 1225, that multiplied together give a square (2480625 = 1575²).

The spelling of 20251225 in words is "twenty million, two hundred fifty-one thousand, two hundred twenty-five".