1542883561 has 2 divisors, whose sum is σ = 1542883562. Its totient is φ = 1542883560.

The previous prime is 1542883513. The next prime is 1542883579. The reversal of 1542883561 is 1653882451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1074593961 + 468289600 = 32781^2 + 21640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542883561 - 2²¹ = 1540786409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1542883591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771441780 + 771441781.

It is an arithmetic number, because the mean of its divisors is an integer number (771441781).

Almost surely, 2^1542883561 is an apocalyptic number.

It is an amenable number.

1542883561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542883561 is an equidigital number, since it uses as much as digits as its factorization.

1542883561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 43.

The square root of 1542883561 is about 39279.5565275373. The cubic root of 1542883561 is about 1155.5206665341.

It can be divided in two parts, 15428 and 83561, that added together give a palindrome (98989).

The spelling of 1542883561 in words is "one billion, five hundred forty-two million, eight hundred eighty-three thousand, five hundred sixty-one".