615091 has 4 divisors (see below), whose sum is σ = 618472. Its totient is φ = 611712.

The previous prime is 615067. The next prime is 615101. The reversal of 615091 is 190516.

615091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 615091 - 2⁷ = 614963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615031) 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, 1401 + ... + 1786.

It is an arithmetic number, because the mean of its divisors is an integer number (154618).

2⁶¹⁵⁰⁹¹ is an apocalyptic number.

615091 is a deficient number, since it is larger than the sum of its proper divisors (3381).

615091 is a wasteful number, since it uses less digits than its factorization.

615091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 615091 is about 784.2773744027. The cubic root of 615091 is about 85.0445441267.

It can be divided in two parts, 6150 and 91, that added together give a square (6241 = 79²).

The spelling of 615091 in words is "six hundred fifteen thousand, ninety-one".