1542315021 has 16 divisors (see below), whose sum is σ = 2344878144. Its totient is φ = 893286144.

The previous prime is 1542314989. The next prime is 1542315023. The reversal of 1542315021 is 1205132451.

It is a happy number.

It is not a de Polignac number, because 1542315021 - 2⁵ = 1542314989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1542314982 and 1542315000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542315023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162471 + ... + 1163796.

It is an arithmetic number, because the mean of its divisors is an integer number (146554884).

Almost surely, 2^1542315021 is an apocalyptic number.

It is an amenable number.

1542315021 is a deficient number, since it is larger than the sum of its proper divisors (802563123).

1542315021 is a wasteful number, since it uses less digits than its factorization.

1542315021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326300.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1542315021 is about 39272.3187627112. The cubic root of 1542315021 is about 1155.3787157851.

Adding to 1542315021 its reverse (1205132451), we get a palindrome (2747447472).

The spelling of 1542315021 in words is "one billion, five hundred forty-two million, three hundred fifteen thousand, twenty-one".