1025213887 has 4 divisors (see below), whose sum is σ = 1060566120. Its totient is φ = 989861656.

The previous prime is 1025213879. The next prime is 1025213909. The reversal of 1025213887 is 7883125201.

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

It is a cyclic number.

It is not a de Polignac number, because 1025213887 - 2³ = 1025213879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025213587) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 17676073 + ... + 17676130.

It is an arithmetic number, because the mean of its divisors is an integer number (265141530).

Almost surely, 2^1025213887 is an apocalyptic number.

1025213887 is a deficient number, since it is larger than the sum of its proper divisors (35352233).

1025213887 is an equidigital number, since it uses as much as digits as its factorization.

1025213887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35352232.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1025213887 is about 32018.9613666652. The cubic root of 1025213887 is about 1008.3349643547.

The spelling of 1025213887 in words is "one billion, twenty-five million, two hundred thirteen thousand, eight hundred eighty-seven".