1025415240 has 64 divisors (see below), whose sum is σ = 3105034560. Its totient is φ = 270885120.

The previous prime is 1025415217. The next prime is 1025415247. The reversal of 1025415240 is 425145201.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1025415240.

It is not an unprimeable number, because it can be changed into a prime (1025415247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27091 + ... + 52770.

It is an arithmetic number, because the mean of its divisors is an integer number (48516165).

Almost surely, 2^1025415240 is an apocalyptic number.

1025415240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025415240 is an abundant number, since it is smaller than the sum of its proper divisors (2079619320).

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

1025415240 is a wasteful number, since it uses less digits than its factorization.

1025415240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79982 (or 79978 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1025415240 is about 32022.1054898019. The cubic root of 1025415240 is about 1008.4009726879.

The spelling of 1025415240 in words is "one billion, twenty-five million, four hundred fifteen thousand, two hundred forty".