1025530042 has 4 divisors (see below), whose sum is σ = 1538295066. Its totient is φ = 512765020.

The previous prime is 1025530039. The next prime is 1025530067. The reversal of 1025530042 is 2400355201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 703363441 + 322166601 = 26521^2 + 17949^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1025529995 and 1025530022.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256382509 + ... + 256382512.

Almost surely, 2^1025530042 is an apocalyptic number.

1025530042 is a deficient number, since it is larger than the sum of its proper divisors (512765024).

1025530042 is an equidigital number, since it uses as much as digits as its factorization.

1025530042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512765023.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1025530042 is about 32023.8979826004. The cubic root of 1025530042 is about 1008.4386036638.

Adding to 1025530042 its reverse (2400355201), we get a palindrome (3425885243).

The spelling of 1025530042 in words is "one billion, twenty-five million, five hundred thirty thousand, forty-two".