1041645521 has 4 divisors (see below), whose sum is σ = 1190452032. Its totient is φ = 892839012.

The previous prime is 1041645499. The next prime is 1041645559. The reversal of 1041645521 is 1255461401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1041645521 is a prime.

It is a super-2 number, since 2×1041645521² = 2170050782838722882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1041645581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74403245 + ... + 74403258.

It is an arithmetic number, because the mean of its divisors is an integer number (297613008).

Almost surely, 2^1041645521 is an apocalyptic number.

It is an amenable number.

1041645521 is a deficient number, since it is larger than the sum of its proper divisors (148806511).

1041645521 is an equidigital number, since it uses as much as digits as its factorization.

1041645521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148806510.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1041645521 is about 32274.5336294733. The cubic root of 1041645521 is about 1013.6934732310.

The spelling of 1041645521 in words is "one billion, forty-one million, six hundred forty-five thousand, five hundred twenty-one".