1542742039 has 2 divisors, whose sum is σ = 1542742040. Its totient is φ = 1542742038.

The previous prime is 1542742009. The next prime is 1542742049. The reversal of 1542742039 is 9302472451.

It is a strong prime.

It is an emirp because it is prime and its reverse (9302472451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1542742039 - 2¹⁷ = 1542610967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1542741989 and 1542742007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542742009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771371019 + 771371020.

It is an arithmetic number, because the mean of its divisors is an integer number (771371020).

Almost surely, 2^1542742039 is an apocalyptic number.

1542742039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542742039 is an equidigital number, since it uses as much as digits as its factorization.

1542742039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1542742039 is about 39277.7550147663. The cubic root of 1542742039 is about 1155.4853351584.

The spelling of 1542742039 in words is "one billion, five hundred forty-two million, seven hundred forty-two thousand, thirty-nine".