1540131427 has 2 divisors, whose sum is σ = 1540131428. Its totient is φ = 1540131426.

The previous prime is 1540131409. The next prime is 1540131433. The reversal of 1540131427 is 7241310451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540131427 - 2²³ = 1531742819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1540131395 and 1540131404.

It is not a weakly prime, because it can be changed into another prime (1540131407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770065713 + 770065714.

It is an arithmetic number, because the mean of its divisors is an integer number (770065714).

Almost surely, 2^1540131427 is an apocalyptic number.

1540131427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540131427 is an equidigital number, since it uses as much as digits as its factorization.

1540131427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1540131427 is about 39244.5082400073. The cubic root of 1540131427 is about 1154.8332004275.

Adding to 1540131427 its reverse (7241310451), we get a palindrome (8781441878).

The spelling of 1540131427 in words is "one billion, five hundred forty million, one hundred thirty-one thousand, four hundred twenty-seven".