1023513 has 4 divisors (see below), whose sum is σ = 1364688. Its totient is φ = 682340.

The previous prime is 1023499. The next prime is 1023521. The reversal of 1023513 is 3153201.

It is a happy number.

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 1023513 - 2⁸ = 1023257 is a prime.

It is a super-2 number, since 2×1023513² = 2095157722338, which contains 22 as substring.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1023492 and 1023501.

It is not an unprimeable number, because it can be changed into a prime (1023313) 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, 170583 + ... + 170588.

It is an arithmetic number, because the mean of its divisors is an integer number (341172).

2^1023513 is an apocalyptic number.

It is an amenable number.

1023513 is a deficient number, since it is larger than the sum of its proper divisors (341175).

1023513 is an equidigital number, since it uses as much as digits as its factorization.

1023513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341174.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1023513 is about 1011.6881930714. The cubic root of 1023513 is about 100.7777027716. Note that the first 4 decimals are identical.

Adding to 1023513 its reverse (3153201), we get a palindrome (4176714).

The spelling of 1023513 in words is "one million, twenty-three thousand, five hundred thirteen".