1240137426 has 32 divisors (see below), whose sum is σ = 2725524288. Its totient is φ = 373053440.

The previous prime is 1240137397. The next prime is 1240137427. The reversal of 1240137426 is 6247310421.

It is a junction number, because it is equal to n+sod(n) for n = 1240137393 and 1240137402.

It is not an unprimeable number, because it can be changed into a prime (1240137427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59535 + ... + 77618.

It is an arithmetic number, because the mean of its divisors is an integer number (85172634).

Almost surely, 2^1240137426 is an apocalyptic number.

1240137426 is an abundant number, since it is smaller than the sum of its proper divisors (1485386862).

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

1240137426 is a wasteful number, since it uses less digits than its factorization.

1240137426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137306.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 1240137426 is about 35215.5849873320. The cubic root of 1240137426 is about 1074.3767581912.

Adding to 1240137426 its reverse (6247310421), we get a palindrome (7487447847).

The spelling of 1240137426 in words is "one billion, two hundred forty million, one hundred thirty-seven thousand, four hundred twenty-six".