1542885061 has 2 divisors, whose sum is σ = 1542885062. Its totient is φ = 1542885060.

The previous prime is 1542885059. The next prime is 1542885137. The reversal of 1542885061 is 1605882451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097928225 + 444956836 = 33135^2 + 21094^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542885061 - 2¹ = 1542885059 is a prime.

It is a super-2 number, since 2×1542885061² = 4760988622913947442, which contains 22 as substring.

Together with 1542885059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542885161) by changing a digit.

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, 771442530 + 771442531.

It is an arithmetic number, because the mean of its divisors is an integer number (771442531).

Almost surely, 2^1542885061 is an apocalyptic number.

It is an amenable number.

1542885061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542885061 is an equidigital number, since it uses as much as digits as its factorization.

1542885061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 1542885061 is about 39279.5756214346. The cubic root of 1542885061 is about 1155.5210410018.

It can be divided in two parts, 15428 and 85061, that added together give a square (100489 = 317²).

The spelling of 1542885061 in words is "one billion, five hundred forty-two million, eight hundred eighty-five thousand, sixty-one".