1542540025 has 24 divisors (see below), whose sum is σ = 2061776024. Its totient is φ = 1138060800.

The previous prime is 1542540019. The next prime is 1542540031. The reversal of 1542540025 is 5200452451.

It is an interprime number because it is at equal distance from previous prime (1542540019) and next prime (1542540031).

It can be written as a sum of positive squares in 12 ways, for example, as 982697104 + 559842921 = 31348^2 + 23661^2 .

It is not a de Polignac number, because 1542540025 - 2¹⁷ = 1542408953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1542539975 and 1542540002.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 693415 + ... + 695635.

Almost surely, 2^1542540025 is an apocalyptic number.

It is an amenable number.

1542540025 is a deficient number, since it is larger than the sum of its proper divisors (519235999).

1542540025 is a wasteful number, since it uses less digits than its factorization.

1542540025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4381 (or 4376 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 1542540025 is about 39275.1833222965. The cubic root of 1542540025 is about 1155.4348980368.

Adding to 1542540025 its reverse (5200452451), we get a palindrome (6742992476).

The spelling of 1542540025 in words is "one billion, five hundred forty-two million, five hundred forty thousand, twenty-five".