2120405250 has 128 divisors (see below), whose sum is σ = 5565111552. Its totient is φ = 537062400.

The previous prime is 2120405249. The next prime is 2120405251. The reversal of 2120405250 is 525040212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2120405249) and next prime (2120405251).

It is a super-2 number, since 2×2120405250² = 8992236848455125000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2120405251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1192362 + ... + 1194138.

It is an arithmetic number, because the mean of its divisors is an integer number (43477434).

Almost surely, 2^2120405250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120405250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2782555776).

2120405250 is an abundant number, since it is smaller than the sum of its proper divisors (3444706302).

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

2120405250 is a wasteful number, since it uses less digits than its factorization.

2120405250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1867 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2120405250 is about 46047.8582563837. The cubic root of 2120405250 is about 1284.7135073683.

Adding to 2120405250 its reverse (525040212), we get a palindrome (2645445462).

The spelling of 2120405250 in words is "two billion, one hundred twenty million, four hundred five thousand, two hundred fifty".