1542042449 has 2 divisors, whose sum is σ = 1542042450. Its totient is φ = 1542042448.

The previous prime is 1542042421. The next prime is 1542042499. The reversal of 1542042449 is 9442402451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1015569424 + 526473025 = 31868^2 + 22945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542042449 - 2⁸ = 1542042193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1542042499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771021224 + 771021225.

It is an arithmetic number, because the mean of its divisors is an integer number (771021225).

Almost surely, 2^1542042449 is an apocalyptic number.

It is an amenable number.

1542042449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542042449 is an equidigital number, since it uses as much as digits as its factorization.

1542042449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 1542042449 is about 39268.8483279049. The cubic root of 1542042449 is about 1155.3106487481.

The spelling of 1542042449 in words is "one billion, five hundred forty-two million, forty-two thousand, four hundred forty-nine".