1025220672 has 224 divisors, whose sum is σ = 3476183040. Its totient is φ = 290234880.

The previous prime is 1025220671. The next prime is 1025220701. The reversal of 1025220672 is 2760225201.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×1025220672² = 2102154852592263168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1025220671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1584253 + ... + 1584899.

Almost surely, 2^1025220672 is an apocalyptic number.

1025220672 is a gapful number since it is divisible by the number (12) 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 1025220672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738091520).

1025220672 is an abundant number, since it is smaller than the sum of its proper divisors (2450962368).

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

1025220672 is a wasteful number, since it uses less digits than its factorization.

1025220672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1025220672 is about 32019.0673193333. The cubic root of 1025220672 is about 1008.3371887808.

Adding to 1025220672 its reverse (2760225201), we get a palindrome (3785445873).

The spelling of 1025220672 in words is "one billion, twenty-five million, two hundred twenty thousand, six hundred seventy-two".