1001235240 has 48 divisors (see below), whose sum is σ = 3254015700. Its totient is φ = 266995968.

The previous prime is 1001235199. The next prime is 1001235253. The reversal of 1001235240 is 425321001.

It can be written as a sum of positive squares in 2 ways, for example, as 999444996 + 1790244 = 31614^2 + 1338^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1390245 + ... + 1390964.

Almost surely, 2^1001235240 is an apocalyptic number.

1001235240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001235240 is an abundant number, since it is smaller than the sum of its proper divisors (2252780460).

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

1001235240 is a wasteful number, since it uses less digits than its factorization.

1001235240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781226 (or 2781219 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1001235240 is about 31642.3014333661. The cubic root of 1001235240 is about 1000.4115772476.

Adding to 1001235240 its reverse (425321001), we get a palindrome (1426556241).

The spelling of 1001235240 in words is "one billion, one million, two hundred thirty-five thousand, two hundred forty".