1047521 has 4 divisors (see below), whose sum is σ = 1081344. Its totient is φ = 1013700.

The previous prime is 1047511. The next prime is 1047533. The reversal of 1047521 is 1257401.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1257401 = 19 ⋅66179.

It is not a de Polignac number, because 1047521 - 2¹⁰ = 1046497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1047493 and 1047502.

It is not an unprimeable number, because it can be changed into a prime (1047511) 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, 16865 + ... + 16926.

It is an arithmetic number, because the mean of its divisors is an integer number (270336).

2^1047521 is an apocalyptic number.

It is an amenable number.

1047521 is a deficient number, since it is larger than the sum of its proper divisors (33823).

1047521 is an equidigital number, since it uses as much as digits as its factorization.

1047521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33822.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1047521 is about 1023.4847336429. The cubic root of 1047521 is about 101.5595838689.

The spelling of 1047521 in words is "one million, forty-seven thousand, five hundred twenty-one".