126553001 has 4 divisors (see below), whose sum is σ = 127402500. Its totient is φ = 125703504.

The previous prime is 126552983. The next prime is 126553003. The reversal of 126553001 is 100355621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100355621 = 107 ⋅937903.

It can be written as a sum of positive squares in 2 ways, for example, as 41267776 + 85285225 = 6424^2 + 9235^2 .

It is a cyclic number.

It is not a de Polignac number, because 126553001 - 2²² = 122358697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126553003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424526 + ... + 424823.

It is an arithmetic number, because the mean of its divisors is an integer number (31850625).

Almost surely, 2^126553001 is an apocalyptic number.

It is an amenable number.

126553001 is a deficient number, since it is larger than the sum of its proper divisors (849499).

126553001 is an equidigital number, since it uses as much as digits as its factorization.

126553001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849498.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 126553001 is about 11249.5778143004. The cubic root of 126553001 is about 502.0621513711.

The spelling of 126553001 in words is "one hundred twenty-six million, five hundred fifty-three thousand, one".