126321969 has 8 divisors (see below), whose sum is σ = 169005312. Its totient is φ = 83926640.

The previous prime is 126321967. The next prime is 126321991. The reversal of 126321969 is 969123621.

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 126321969 - 2¹ = 126321967 is a prime.

It is a super-2 number, since 2×126321969² = 31914479704073922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126321967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70977 + ... + 72734.

It is an arithmetic number, because the mean of its divisors is an integer number (21125664).

Almost surely, 2^126321969 is an apocalyptic number.

It is an amenable number.

126321969 is a deficient number, since it is larger than the sum of its proper divisors (42683343).

126321969 is a wasteful number, since it uses less digits than its factorization.

126321969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144007.

The product of its digits is 34992, while the sum is 39.

The square root of 126321969 is about 11239.3046493099. The cubic root of 126321969 is about 501.7564478898.

It can be divided in two parts, 1263 and 21969, that added together give a palindrome (23232).

The spelling of 126321969 in words is "one hundred twenty-six million, three hundred twenty-one thousand, nine hundred sixty-nine".