615801 has 4 divisors (see below), whose sum is σ = 821072. Its totient is φ = 410532.

The previous prime is 615799. The next prime is 615821. The reversal of 615801 is 108516.

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 not a de Polignac number, because 615801 - 2¹ = 615799 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615821) 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, 102631 + ... + 102636.

It is an arithmetic number, because the mean of its divisors is an integer number (205268).

2⁶¹⁵⁸⁰¹ is an apocalyptic number.

It is an amenable number.

615801 is a deficient number, since it is larger than the sum of its proper divisors (205271).

615801 is a wasteful number, since it uses less digits than its factorization.

615801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205270.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 615801 is about 784.7298898347. The cubic root of 615801 is about 85.0772538712.

The spelling of 615801 in words is "six hundred fifteen thousand, eight hundred one".