1542521425 has 6 divisors (see below), whose sum is σ = 1912726598. Its totient is φ = 1234017120.

The previous prime is 1542521419. The next prime is 1542521437. The reversal of 1542521425 is 5241252451.

It can be written as a sum of positive squares in 3 ways, for example, as 66194496 + 1476326929 = 8136^2 + 38423^2 .

It is not a de Polignac number, because 1542521425 - 2¹⁵ = 1542488657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30850404 + ... + 30850453.

Almost surely, 2^1542521425 is an apocalyptic number.

It is an amenable number.

1542521425 is a deficient number, since it is larger than the sum of its proper divisors (370205173).

1542521425 is an equidigital number, since it uses as much as digits as its factorization.

1542521425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61700867 (or 61700862 counting only the distinct ones).

The product of its digits is 16000, while the sum is 31.

The square root of 1542521425 is about 39274.9465308357. The cubic root of 1542521425 is about 1155.4302539270.

Adding to 1542521425 its reverse (5241252451), we get a palindrome (6783773876).

The spelling of 1542521425 in words is "one billion, five hundred forty-two million, five hundred twenty-one thousand, four hundred twenty-five".