126645949 has 4 divisors (see below), whose sum is σ = 127829664. Its totient is φ = 125462236.

The previous prime is 126645941. The next prime is 126645983. The reversal of 126645949 is 949546621.

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 126645949 - 2³ = 126645941 is a prime.

It is a super-2 number, since 2×126645949² = 32078392796221202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126645899 and 126645908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126645941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591697 + ... + 591910.

It is an arithmetic number, because the mean of its divisors is an integer number (31957416).

Almost surely, 2^126645949 is an apocalyptic number.

It is an amenable number.

126645949 is a deficient number, since it is larger than the sum of its proper divisors (1183715).

126645949 is a wasteful number, since it uses less digits than its factorization.

126645949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183714.

The product of its digits is 466560, while the sum is 46.

The square root of 126645949 is about 11253.7082332891. The cubic root of 126645949 is about 502.1850359925.

The spelling of 126645949 in words is "one hundred twenty-six million, six hundred forty-five thousand, nine hundred forty-nine".