615361 has 4 divisors (see below), whose sum is σ = 619092. Its totient is φ = 611632.

The previous prime is 615343. The next prime is 615367. The reversal of 615361 is 163516.

615361 = T₆₃₉ + T₆₄₀ + T₆₄₁.

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

It can be written as a sum of positive squares in 2 ways, for example, as 323761 + 291600 = 569^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 615361 - 2⁷ = 615233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615367) 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, 1606 + ... + 1951.

It is an arithmetic number, because the mean of its divisors is an integer number (154773).

2⁶¹⁵³⁶¹ is an apocalyptic number.

615361 is the 641-st centered triangular number.

It is an amenable number.

615361 is a deficient number, since it is larger than the sum of its proper divisors (3731).

615361 is a wasteful number, since it uses less digits than its factorization.

615361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730.

The product of its digits is 540, while the sum is 22.

The square root of 615361 is about 784.4494884950. The cubic root of 615361 is about 85.0569860081.

Adding to 615361 its reverse (163516), we get a palindrome (778877).

The spelling of 615361 in words is "six hundred fifteen thousand, three hundred sixty-one".