1025040 has 40 divisors (see below), whose sum is σ = 3178368. Its totient is φ = 273280.

The previous prime is 1025039. The next prime is 1025047. The reversal of 1025040 is 405201.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an Ulam number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1025047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1896 + ... + 2375.

2^1025040 is an apocalyptic number.

1025040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025040 is an abundant number, since it is smaller than the sum of its proper divisors (2153328).

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

1025040 is a wasteful number, since it uses less digits than its factorization.

1025040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287 (or 4281 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 1025040 is about 1012.4425909650. The cubic root of 1025040 is about 100.8277953079.

The spelling of 1025040 in words is "one million, twenty-five thousand, forty".