126199501 has 4 divisors (see below), whose sum is σ = 132841600. Its totient is φ = 119557404.

The previous prime is 126199487. The next prime is 126199523. The reversal of 126199501 is 105991621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126199501 - 2¹¹ = 126197453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126199531) 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, 3321021 + ... + 3321058.

It is an arithmetic number, because the mean of its divisors is an integer number (33210400).

Almost surely, 2^126199501 is an apocalyptic number.

It is an amenable number.

126199501 is a deficient number, since it is larger than the sum of its proper divisors (6642099).

126199501 is an equidigital number, since it uses as much as digits as its factorization.

126199501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642098.

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 126199501 is about 11233.8551263580. The cubic root of 126199501 is about 501.5942460233.

The spelling of 126199501 in words is "one hundred twenty-six million, one hundred ninety-nine thousand, five hundred one".