126540001 has 9 divisors (see below), whose sum is σ = 147291249. Its totient is φ = 108395364.

The previous prime is 126539977. The next prime is 126540031. The reversal of 126540001 is 100045621.

The square root of 126540001 is 11249.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 126540001 - 2⁵ = 126539969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126540031) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 77940 + ... + 79546.

Almost surely, 2^126540001 is an apocalyptic number.

126540001 is the 11249-th square number.

126540001 is the 5625-th centered octagonal number.

It is an amenable number.

126540001 is a deficient number, since it is larger than the sum of its proper divisors (20751248).

126540001 is an frugal number, since it uses more digits than its factorization.

126540001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The cubic root of 126540001 is about 502.0449595453.

Adding to 126540001 its reverse (100045621), we get a palindrome (226585622).

The spelling of 126540001 in words is "one hundred twenty-six million, five hundred forty thousand, one".