1001240 has 16 divisors (see below), whose sum is σ = 2252880. Its totient is φ = 400480.

The previous prime is 1001237. The next prime is 1001267. The reversal of 1001240 is 421001.

1001240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12476 + ... + 12555.

It is an arithmetic number, because the mean of its divisors is an integer number (140805).

2^1001240 is an apocalyptic number.

1001240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001240 is an abundant number, since it is smaller than the sum of its proper divisors (1251640).

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

1001240 is a wasteful number, since it uses less digits than its factorization.

1001240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25042 (or 25038 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1001240 is about 1000.6198079191. The cubic root of 1001240 is about 100.0413162606.

Adding to 1001240 its reverse (421001), we get a palindrome (1422241).

The spelling of 1001240 in words is "one million, one thousand, two hundred forty".