1025240 has 48 divisors (see below), whose sum is σ = 2468880. Its totient is φ = 383040.

The previous prime is 1025239. The next prime is 1025257. The reversal of 1025240 is 425201.

It is a super-2 number, since 2×1025240² = 2102234115200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14405 + ... + 14475.

It is an arithmetic number, because the mean of its divisors is an integer number (51435).

2^1025240 is an apocalyptic number.

1025240 is a gapful number since it is divisible by the number (10) 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 1025240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234440).

1025240 is an abundant number, since it is smaller than the sum of its proper divisors (1443640).

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

1025240 is a wasteful number, since it uses less digits than its factorization.

1025240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1025240 is about 1012.5413571800. The cubic root of 1025240 is about 100.8343525309.

The spelling of 1025240 in words is "one million, twenty-five thousand, two hundred forty".