615023 has 4 divisors (see below), whose sum is σ = 619248. Its totient is φ = 610800.

The previous prime is 615019. The next prime is 615031. The reversal of 615023 is 320516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 615023 - 2² = 615019 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 614992 and 615010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886 + ... + 2187.

It is an arithmetic number, because the mean of its divisors is an integer number (154812).

2⁶¹⁵⁰²³ is an apocalyptic number.

615023 is a deficient number, since it is larger than the sum of its proper divisors (4225).

615023 is a wasteful number, since it uses less digits than its factorization.

615023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 615023 is about 784.2340211952. The cubic root of 615023 is about 85.0414100419.

Adding to 615023 its reverse (320516), we get a palindrome (935539).

The spelling of 615023 in words is "six hundred fifteen thousand, twenty-three".