126148921 has 4 divisors (see below), whose sum is σ = 126440692. Its totient is φ = 125857152.

The previous prime is 126148877. The next prime is 126148931. The reversal of 126148921 is 129841621.

It is a happy number.

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 19316025 + 106832896 = 4395^2 + 10336^2 .

It is a cyclic number.

It is not a de Polignac number, because 126148921 - 2¹⁹ = 125624633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126148931) 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 3 ways as a sum of consecutive naturals, for example, 145236 + ... + 146101.

It is an arithmetic number, because the mean of its divisors is an integer number (31610173).

Almost surely, 2^126148921 is an apocalyptic number.

It is an amenable number.

126148921 is a deficient number, since it is larger than the sum of its proper divisors (291771).

126148921 is an equidigital number, since it uses as much as digits as its factorization.

126148921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291770.

The product of its digits is 6912, while the sum is 34.

The square root of 126148921 is about 11231.6036700019. The cubic root of 126148921 is about 501.5272250843.

The spelling of 126148921 in words is "one hundred twenty-six million, one hundred forty-eight thousand, nine hundred twenty-one".