1542121342 has 16 divisors (see below), whose sum is σ = 2496990240. Its totient is φ = 712103392.

The previous prime is 1542121309. The next prime is 1542121363. The reversal of 1542121342 is 2431212451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576673 + ... + 579340.

It is an arithmetic number, because the mean of its divisors is an integer number (156061890).

Almost surely, 2^1542121342 is an apocalyptic number.

1542121342 is a deficient number, since it is larger than the sum of its proper divisors (954868898).

1542121342 is a wasteful number, since it uses less digits than its factorization.

1542121342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156067.

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

The square root of 1542121342 is about 39269.8528390418. The cubic root of 1542121342 is about 1155.3303508362.

Adding to 1542121342 its reverse (2431212451), we get a palindrome (3973333793).

It can be divided in two parts, 15421 and 21342, that added together give a palindrome (36763).

The spelling of 1542121342 in words is "one billion, five hundred forty-two million, one hundred twenty-one thousand, three hundred forty-two".