126415321 has 8 divisors (see below), whose sum is σ = 131254920. Its totient is φ = 121607808.

The previous prime is 126415307. The next prime is 126415327. The reversal of 126415321 is 123514621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25613721 + 100801600 = 5061^2 + 10040^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126415321 - 2¹³ = 126407129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126415327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165 + ... + 15901.

It is an arithmetic number, because the mean of its divisors is an integer number (16406865).

Almost surely, 2^126415321 is an apocalyptic number.

It is an amenable number.

126415321 is a deficient number, since it is larger than the sum of its proper divisors (4839599).

126415321 is a wasteful number, since it uses less digits than its factorization.

126415321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16043.

The product of its digits is 1440, while the sum is 25.

The square root of 126415321 is about 11243.4568082952. The cubic root of 126415321 is about 501.8800168799.

Adding to 126415321 its reverse (123514621), we get a palindrome (249929942).

It can be divided in two parts, 126415 and 321, that added together give a square (126736 = 356²).

The spelling of 126415321 in words is "one hundred twenty-six million, four hundred fifteen thousand, three hundred twenty-one".