126615 has 16 divisors (see below), whose sum is σ = 211968. Its totient is φ = 64416.

The previous prime is 126613. The next prime is 126631. The reversal of 126615 is 516621.

126615 = T₅₀ + T₅₁ + ... + T₉₅.

It is a happy number.

It is not a de Polignac number, because 126615 - 2¹ = 126613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126591 and 126600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162 + ... + 528.

It is an arithmetic number, because the mean of its divisors is an integer number (13248).

2¹²⁶⁶¹⁵ is an apocalyptic number.

126615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126615 is a deficient number, since it is larger than the sum of its proper divisors (85353).

126615 is a wasteful number, since it uses less digits than its factorization.

126615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398.

The product of its digits is 360, while the sum is 21.

The square root of 126615 is about 355.8300155973. The cubic root of 126615 is about 50.2144125641.

It can be divided in two parts, 126 and 615, that added together give a triangular number (741 = T₃₈).

The spelling of 126615 in words is "one hundred twenty-six thousand, six hundred fifteen".