1542402544225 has 81 divisors (see below), whose sum is σ = 2147053386987. Its totient is φ = 1098784604160.

The previous prime is 1542402544217. The next prime is 1542402544231. The reversal of 1542402544225 is 5224452042451.

The square root of 1542402544225 is 1241935.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 703573696849 + 838828847376 = 838793^2 + 915876^2 .

It is not a de Polignac number, because 1542402544225 - 2³ = 1542402544217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2005724641 + ... + 2005725409.

Almost surely, 2^{1542402544225} is an apocalyptic number.

1542402544225 is the 1241935-th square number.

1542402544225 is the 620968-th centered octagonal number.

It is an amenable number.

1542402544225 is a deficient number, since it is larger than the sum of its proper divisors (604650842762).

1542402544225 is an frugal number, since it uses more digits than its factorization.

1542402544225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 40.

Adding to 1542402544225 its reverse (5224452042451), we get a palindrome (6766854586676).

The spelling of 1542402544225 in words is "one trillion, five hundred forty-two billion, four hundred two million, five hundred forty-four thousand, two hundred twenty-five".