1240104020 has 12 divisors (see below), whose sum is σ = 2604218484. Its totient is φ = 496041600.

The previous prime is 1240103933. The next prime is 1240104029. The reversal of 1240104020 is 204010421.

It can be written as a sum of positive squares in 2 ways, for example, as 635140804 + 604963216 = 25202^2 + 24596^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1240103986 and 1240104004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240104029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31002581 + ... + 31002620.

It is an arithmetic number, because the mean of its divisors is an integer number (217018207).

Almost surely, 2^1240104020 is an apocalyptic number.

1240104020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240104020 is an abundant number, since it is smaller than the sum of its proper divisors (1364114464).

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

1240104020 is a wasteful number, since it uses less digits than its factorization.

1240104020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62005210 (or 62005208 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1240104020 is about 35215.1106770943. The cubic root of 1240104020 is about 1074.3671111549.

Adding to 1240104020 its reverse (204010421), we get a palindrome (1444114441).

The spelling of 1240104020 in words is "one billion, two hundred forty million, one hundred four thousand, twenty".