1065021561525 has 48 divisors (see below), whose sum is σ = 1781845065728. Its totient is φ = 561274272000.

The previous prime is 1065021561491. The next prime is 1065021561559. The reversal of 1065021561525 is 5251651205601.

It is an interprime number because it is at equal distance from previous prime (1065021561491) and next prime (1065021561559).

It is not a de Polignac number, because 1065021561525 - 2¹⁰ = 1065021560501 is a prime.

It is a super-2 number, since 2×1065021561525² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1881420 + ... + 2381130.

Almost surely, 2^{1065021561525} is an apocalyptic number.

1065021561525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1065021561525 is a deficient number, since it is larger than the sum of its proper divisors (716823504203).

1065021561525 is a wasteful number, since it uses less digits than its factorization.

1065021561525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500062 (or 500057 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 39.

The spelling of 1065021561525 in words is "one trillion, sixty-five billion, twenty-one million, five hundred sixty-one thousand, five hundred twenty-five".