1001225420 has 48 divisors (see below), whose sum is σ = 2362772160. Its totient is φ = 353607936.

The previous prime is 1001225419. The next prime is 1001225437. The reversal of 1001225420 is 245221001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77735 + ... + 89694.

It is an arithmetic number, because the mean of its divisors is an integer number (49224420).

Almost surely, 2^1001225420 is an apocalyptic number.

1001225420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001225420 is an abundant number, since it is smaller than the sum of its proper divisors (1361546740).

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

1001225420 is a wasteful number, since it uses less digits than its factorization.

1001225420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167474 (or 167472 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1001225420 is about 31642.1462609602. The cubic root of 1001225420 is about 1000.4083065964.

Adding to 1001225420 its reverse (245221001), we get a palindrome (1246446421).

It can be divided in two parts, 1001225 and 420, that multiplied together give a triangular number (420514500 = T₂₉₀₀₀).

The spelling of 1001225420 in words is "one billion, one million, two hundred twenty-five thousand, four hundred twenty".