126634421 has 4 divisors (see below), whose sum is σ = 127545600. Its totient is φ = 125723244.

The previous prime is 126634399. The next prime is 126634423. The reversal of 126634421 is 124436621.

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 126634421 - 2⁶ = 126634357 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 (126634423) 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, 455381 + ... + 455658.

It is an arithmetic number, because the mean of its divisors is an integer number (31886400).

Almost surely, 2^126634421 is an apocalyptic number.

It is an amenable number.

126634421 is a deficient number, since it is larger than the sum of its proper divisors (911179).

126634421 is an equidigital number, since it uses as much as digits as its factorization.

126634421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911178.

The product of its digits is 6912, while the sum is 29.

The square root of 126634421 is about 11253.1960349049. The cubic root of 126634421 is about 502.1697983298.

The spelling of 126634421 in words is "one hundred twenty-six million, six hundred thirty-four thousand, four hundred twenty-one".