1542202261 has 2 divisors, whose sum is σ = 1542202262. Its totient is φ = 1542202260.

The previous prime is 1542202247. The next prime is 1542202271. The reversal of 1542202261 is 1622022451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1274061636 + 268140625 = 35694^2 + 16375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542202261 - 2⁷ = 1542202133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542202271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771101130 + 771101131.

It is an arithmetic number, because the mean of its divisors is an integer number (771101131).

Almost surely, 2^1542202261 is an apocalyptic number.

It is an amenable number.

1542202261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542202261 is an equidigital number, since it uses as much as digits as its factorization.

1542202261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1542202261 is about 39270.8831196855. The cubic root of 1542202261 is about 1155.3505581828.

The spelling of 1542202261 in words is "one billion, five hundred forty-two million, two hundred two thousand, two hundred sixty-one".