1542123377 has 2 divisors, whose sum is σ = 1542123378. Its totient is φ = 1542123376.

The previous prime is 1542123311. The next prime is 1542123379. The reversal of 1542123377 is 7733212451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1505750416 + 36372961 = 38804^2 + 6031^2 .

It is an emirp because it is prime and its reverse (7733212451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1542123377 - 2³⁰ = 468381553 is a prime.

Together with 1542123379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1542123379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771061688 + 771061689.

It is an arithmetic number, because the mean of its divisors is an integer number (771061689).

Almost surely, 2^1542123377 is an apocalyptic number.

It is an amenable number.

1542123377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542123377 is an equidigital number, since it uses as much as digits as its factorization.

1542123377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 35.

The square root of 1542123377 is about 39269.8787494945. The cubic root of 1542123377 is about 1155.3308590314.

The spelling of 1542123377 in words is "one billion, five hundred forty-two million, one hundred twenty-three thousand, three hundred seventy-seven".