126253352621 has 4 divisors (see below), whose sum is σ = 137730930144. Its totient is φ = 114775775100.

The previous prime is 126253352609. The next prime is 126253352627.

126253352621 is nontrivially palindromic in base 10.

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 126253352621 - 2⁶ = 126253352557 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 (126253352627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5738788745 + ... + 5738788766.

It is an arithmetic number, because the mean of its divisors is an integer number (34432732536).

Almost surely, 2^126253352621 is an apocalyptic number.

126253352621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126253352621 is a deficient number, since it is larger than the sum of its proper divisors (11477577523).

126253352621 is a wasteful number, since it uses less digits than its factorization.

126253352621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11477577522.

The product of its digits is 129600, while the sum is 38.

It can be divided in two parts, 126253 and 352621, that added together give a palindrome (478874).

The spelling of 126253352621 in words is "one hundred twenty-six billion, two hundred fifty-three million, three hundred fifty-two thousand, six hundred twenty-one".