1540769141 has 2 divisors, whose sum is σ = 1540769142. Its totient is φ = 1540769140.

The previous prime is 1540769063. The next prime is 1540769183. The reversal of 1540769141 is 1419670451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1472640625 + 68128516 = 38375^2 + 8254^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540769141 - 2²⁶ = 1473660277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1540769095 and 1540769104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540769341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770384570 + 770384571.

It is an arithmetic number, because the mean of its divisors is an integer number (770384571).

Almost surely, 2^1540769141 is an apocalyptic number.

It is an amenable number.

1540769141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540769141 is an equidigital number, since it uses as much as digits as its factorization.

1540769141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1540769141 is about 39252.6322811605. The cubic root of 1540769141 is about 1154.9925703063.

It can be divided in two parts, 15407 and 69141, that added together give a palindrome (84548).

The spelling of 1540769141 in words is "one billion, five hundred forty million, seven hundred sixty-nine thousand, one hundred forty-one".