1240131001 has 6 divisors (see below), whose sum is σ = 1244933690. Its totient is φ = 1235346768.

The previous prime is 1240130993. The next prime is 1240131017. The reversal of 1240131001 is 1001310421.

It can be written as a sum of positive squares in only one way, i.e., 1080765625 + 159365376 = 32875^2 + 12624^2 .

It is not a de Polignac number, because 1240131001 - 2³ = 1240130993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240131091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60205 + ... + 78133.

Almost surely, 2^1240131001 is an apocalyptic number.

It is an amenable number.

1240131001 is a deficient number, since it is larger than the sum of its proper divisors (4802689).

1240131001 is an frugal number, since it uses more digits than its factorization.

1240131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18455 (or 18192 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1240131001 is about 35215.4937633991. The cubic root of 1240131001 is about 1074.3749027833.

Adding to 1240131001 its reverse (1001310421), we get a palindrome (2241441422).

The spelling of 1240131001 in words is "one billion, two hundred forty million, one hundred thirty-one thousand, one".