126787321 has 8 divisors (see below), whose sum is σ = 127967840. Its totient is φ = 125610912.

The previous prime is 126787313. The next prime is 126787357. The reversal of 126787321 is 123787621.

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 126787321 - 2³ = 126787313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126781321) 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, 122221 + ... + 123253.

It is an arithmetic number, because the mean of its divisors is an integer number (15995980).

Almost surely, 2^126787321 is an apocalyptic number.

It is an amenable number.

126787321 is a deficient number, since it is larger than the sum of its proper divisors (1180519).

126787321 is a wasteful number, since it uses less digits than its factorization.

126787321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055.

The product of its digits is 28224, while the sum is 37.

The square root of 126787321 is about 11259.9876110056. The cubic root of 126787321 is about 502.3718257613.

It can be divided in two parts, 1267 and 87321, that added together give a palindrome (88588).

The spelling of 126787321 in words is "one hundred twenty-six million, seven hundred eighty-seven thousand, three hundred twenty-one".