1540660126 has 4 divisors (see below), whose sum is σ = 2310990192. Its totient is φ = 770330062.

The previous prime is 1540660111. The next prime is 1540660153. The reversal of 1540660126 is 6210660451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6210660451 = 199 ⋅31209349.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 385165030 + ... + 385165033.

It is an arithmetic number, because the mean of its divisors is an integer number (577747548).

Almost surely, 2^1540660126 is an apocalyptic number.

1540660126 is a deficient number, since it is larger than the sum of its proper divisors (770330066).

1540660126 is an equidigital number, since it uses as much as digits as its factorization.

1540660126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770330065.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1540660126 is about 39251.2436236102. The cubic root of 1540660126 is about 1154.9653296940.

The spelling of 1540660126 in words is "one billion, five hundred forty million, six hundred sixty thousand, one hundred twenty-six".