126538877 has 2 divisors, whose sum is σ = 126538878. Its totient is φ = 126538876.

The previous prime is 126538873. The next prime is 126538883. The reversal of 126538877 is 778835621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76143076 + 50395801 = 8726^2 + 7099^2 .

It is a cyclic number.

It is not a de Polignac number, because 126538877 - 2² = 126538873 is a prime.

It is a super-2 number, since 2×126538877² = 32024174784842258, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126538873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63269438 + 63269439.

It is an arithmetic number, because the mean of its divisors is an integer number (63269439).

Almost surely, 2^126538877 is an apocalyptic number.

It is an amenable number.

126538877 is a deficient number, since it is larger than the sum of its proper divisors (1).

126538877 is an equidigital number, since it uses as much as digits as its factorization.

126538877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 126538877 is about 11248.9500398926. The cubic root of 126538877 is about 502.0434730583.

The spelling of 126538877 in words is "one hundred twenty-six million, five hundred thirty-eight thousand, eight hundred seventy-seven".