25122020 has 72 divisors (see below), whose sum is σ = 66316992. Its totient is φ = 7824960.

The previous prime is 25122011. The next prime is 25122029. The reversal of 25122020 is 2022152.

25122020 = 38² + 39² + ... + 422².

It is an interprime number because it is at equal distance from previous prime (25122011) and next prime (25122029).

It is a super-2 number, since 2×25122020² = 1262231777760800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 25121986 and 25122004.

It is not an unprimeable number, because it can be changed into a prime (25122029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16199 + ... + 17681.

Almost surely, 2^25122020 is an apocalyptic number.

25122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33158496).

25122020 is an abundant number, since it is smaller than the sum of its proper divisors (41194972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25122020 is a wasteful number, since it uses less digits than its factorization.

25122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 25122020 is about 5012.1871473440. The cubic root of 25122020 is about 292.8767201439.

Adding to 25122020 its reverse (2022152), we get a palindrome (27144172).

The spelling of 25122020 in words is "twenty-five million, one hundred twenty-two thousand, twenty".