1065521501 has 8 divisors (see below), whose sum is σ = 1223565600. Its totient is φ = 917673840.

The previous prime is 1065521459. The next prime is 1065521503. The reversal of 1065521501 is 1051255601.

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

It is a cyclic number.

It is not a de Polignac number, because 1065521501 - 2¹⁸ = 1065259357 is a prime.

It is a super-2 number, since 2×1065521501² = 2270672138186586002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065521503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2548886 + ... + 2549303.

It is an arithmetic number, because the mean of its divisors is an integer number (152945700).

Almost surely, 2^1065521501 is an apocalyptic number.

1065521501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1065521501 is a deficient number, since it is larger than the sum of its proper divisors (158044099).

1065521501 is a wasteful number, since it uses less digits than its factorization.

1065521501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5098219.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 1065521501 is about 32642.3268318911. The cubic root of 1065521501 is about 1021.3801325732.

The spelling of 1065521501 in words is "one billion, sixty-five million, five hundred twenty-one thousand, five hundred one".