1542123403 has 2 divisors, whose sum is σ = 1542123404. Its totient is φ = 1542123402.

The previous prime is 1542123379. The next prime is 1542123509. The reversal of 1542123403 is 3043212451.

It is a weak prime.

It is an emirp because it is prime and its reverse (3043212451) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542123403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1542121403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771061701 + 771061702.

It is an arithmetic number, because the mean of its divisors is an integer number (771061702).

Almost surely, 2^1542123403 is an apocalyptic number.

1542123403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542123403 is an equidigital number, since it uses as much as digits as its factorization.

1542123403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1542123403 is about 39269.8790805370. The cubic root of 1542123403 is about 1155.3308655243.

Adding to 1542123403 its reverse (3043212451), we get a palindrome (4585335854).

The spelling of 1542123403 in words is "one billion, five hundred forty-two million, one hundred twenty-three thousand, four hundred three".