1072509 has 4 divisors (see below), whose sum is σ = 1430016. Its totient is φ = 715004.

The previous prime is 1072471. The next prime is 1072517. The reversal of 1072509 is 9052701.

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 not a de Polignac number, because 1072509 - 2⁷ = 1072381 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072009) 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, 178749 + ... + 178754.

It is an arithmetic number, because the mean of its divisors is an integer number (357504).

2^1072509 is an apocalyptic number.

It is an amenable number.

1072509 is a deficient number, since it is larger than the sum of its proper divisors (357507).

1072509 is an equidigital number, since it uses as much as digits as its factorization.

1072509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357506.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 1072509 is about 1035.6201040922. The cubic root of 1072509 is about 102.3607945720.

The spelling of 1072509 in words is "one million, seventy-two thousand, five hundred nine".