126514921 has 6 divisors (see below), whose sum is σ = 136995630. Its totient is φ = 116782848.

The previous prime is 126514909. The next prime is 126514931. The reversal of 126514921 is 129415621.

It can be written as a sum of positive squares in 3 ways, for example, as 10112400 + 116402521 = 3180^2 + 10789^2 .

It is not a de Polignac number, because 126514921 - 2¹⁷ = 126383849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126514931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374136 + ... + 374473.

It is an arithmetic number, because the mean of its divisors is an integer number (22832605).

Almost surely, 2^126514921 is an apocalyptic number.

It is an amenable number.

126514921 is a deficient number, since it is larger than the sum of its proper divisors (10480709).

126514921 is an equidigital number, since it uses as much as digits as its factorization.

126514921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748635 (or 748622 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 126514921 is about 11247.8851790014. The cubic root of 126514921 is about 502.0117892185.

The spelling of 126514921 in words is "one hundred twenty-six million, five hundred fourteen thousand, nine hundred twenty-one".