1021625120 has 48 divisors (see below), whose sum is σ = 2454520320. Its totient is φ = 401720064.

The previous prime is 1021625113. The next prime is 1021625131. The reversal of 1021625120 is 215261201.

It is a super-5 number, since 5×1021625120⁵ (a number of 46 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1021625092 and 1021625101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44672 + ... + 63551.

It is an arithmetic number, because the mean of its divisors is an integer number (51135840).

Almost surely, 2^1021625120 is an apocalyptic number.

1021625120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021625120 is an abundant number, since it is smaller than the sum of its proper divisors (1432895200).

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

1021625120 is a wasteful number, since it uses less digits than its factorization.

1021625120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108297 (or 108289 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1021625120 is about 31962.8709599122. The cubic root of 1021625120 is about 1007.1570280808.

Adding to 1021625120 its reverse (215261201), we get a palindrome (1236886321).

The spelling of 1021625120 in words is "one billion, twenty-one million, six hundred twenty-five thousand, one hundred twenty".