1542532421 has 8 divisors (see below), whose sum is σ = 1647032640. Its totient is φ = 1441151712.

The previous prime is 1542532373. The next prime is 1542532487. The reversal of 1542532421 is 1242352451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1542532421 - 2¹⁴ = 1542516037 is a prime.

It is a super-2 number, since 2×1542532421² = 4758812539672242482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542532021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778856 + ... + 780833.

It is an arithmetic number, because the mean of its divisors is an integer number (205879080).

Almost surely, 2^1542532421 is an apocalyptic number.

It is an amenable number.

1542532421 is a deficient number, since it is larger than the sum of its proper divisors (104500219).

1542532421 is a wasteful number, since it uses less digits than its factorization.

1542532421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559755.

The product of its digits is 9600, while the sum is 29.

The square root of 1542532421 is about 39275.0865180460. The cubic root of 1542532421 is about 1155.4329994493.

Adding to 1542532421 its reverse (1242352451), we get a palindrome (2784884872).

The spelling of 1542532421 in words is "one billion, five hundred forty-two million, five hundred thirty-two thousand, four hundred twenty-one".