1020440425 has 24 divisors (see below), whose sum is σ = 1323558144. Its totient is φ = 778968960.

The previous prime is 1020440413. The next prime is 1020440437. The reversal of 1020440425 is 5240440201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1020440413) and next prime (1020440437).

It is not a de Polignac number, because 1020440425 - 2²⁷ = 886222697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020440396 and 1020440405.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264309 + ... + 268141.

It is an arithmetic number, because the mean of its divisors is an integer number (55148256).

Almost surely, 2^1020440425 is an apocalyptic number.

It is an amenable number.

1020440425 is a deficient number, since it is larger than the sum of its proper divisors (303117719).

1020440425 is a wasteful number, since it uses less digits than its factorization.

1020440425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329 (or 4324 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1020440425 is about 31944.3332220286. Note that the first 3 decimals coincide. The cubic root of 1020440425 is about 1006.7675716556.

Adding to 1020440425 its reverse (5240440201), we get a palindrome (6260880626).

The spelling of 1020440425 in words is "one billion, twenty million, four hundred forty thousand, four hundred twenty-five".