1025121642 has 8 divisors (see below), whose sum is σ = 2050243296. Its totient is φ = 341707212.

The previous prime is 1025121599. The next prime is 1025121679. The reversal of 1025121642 is 2461215201.

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

1025121642 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85426798 + ... + 85426809.

It is an arithmetic number, because the mean of its divisors is an integer number (256280412).

Almost surely, 2^1025121642 is an apocalyptic number.

1025121642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025121642 is a wasteful number, since it uses less digits than its factorization.

1025121642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170853612.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1025121642 is about 32017.5208596793. The cubic root of 1025121642 is about 1008.3047213489.

Adding to 1025121642 its reverse (2461215201), we get a palindrome (3486336843).

The spelling of 1025121642 in words is "one billion, twenty-five million, one hundred twenty-one thousand, six hundred forty-two".