1240043120537 has 16 divisors (see below), whose sum is σ = 1338099828240. Its totient is φ = 1142369740800.

The previous prime is 1240043120483. The next prime is 1240043120549. The reversal of 1240043120537 is 7350213400421.

It can be written as a sum of positive squares in 8 ways, for example, as 148093359241 + 1091949761296 = 384829^2 + 1044964^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240043120537 - 2¹⁸ = 1240042858393 is a prime.

It is a super-2 number, since 2×1240043120537² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240043120557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14688587 + ... + 14772767.

It is an arithmetic number, because the mean of its divisors is an integer number (83631239265).

Almost surely, 2^{1240043120537} is an apocalyptic number.

It is an amenable number.

1240043120537 is a deficient number, since it is larger than the sum of its proper divisors (98056707703).

1240043120537 is a wasteful number, since it uses less digits than its factorization.

1240043120537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86444.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 1240043120537 its reverse (7350213400421), we get a palindrome (8590256520958).

The spelling of 1240043120537 in words is "one trillion, two hundred forty billion, forty-three million, one hundred twenty thousand, five hundred thirty-seven".