1240421031 has 48 divisors (see below), whose sum is σ = 1995140160. Its totient is φ = 738984960.

The previous prime is 1240421029. The next prime is 1240421071. The reversal of 1240421031 is 1301240421.

1240421031 is a `hidden beast` number, since 1 + 240 + 421 + 0 + 3 + 1 = 666.

It is not a de Polignac number, because 1240421031 - 2¹ = 1240421029 is a prime.

It is a super-2 number, since 2×1240421031² = 3077288668294205922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240420995 and 1240421013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240421071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 268366 + ... + 272948.

It is an arithmetic number, because the mean of its divisors is an integer number (41565420).

Almost surely, 2^1240421031 is an apocalyptic number.

1240421031 is a deficient number, since it is larger than the sum of its proper divisors (754719129).

1240421031 is a wasteful number, since it uses less digits than its factorization.

1240421031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696 (or 4693 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1240421031 is about 35219.6114544156. The cubic root of 1240421031 is about 1074.4586511035.

Adding to 1240421031 its reverse (1301240421), we get a palindrome (2541661452).

The spelling of 1240421031 in words is "one billion, two hundred forty million, four hundred twenty-one thousand, thirty-one".