127621243 has 4 divisors (see below), whose sum is σ = 127757808. Its totient is φ = 127484680.

The previous prime is 127621237. The next prime is 127621259. The reversal of 127621243 is 342126721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342126721 = 167 ⋅2048663.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127621243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127621213) 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, 66871 + ... + 68752.

It is an arithmetic number, because the mean of its divisors is an integer number (31939452).

Almost surely, 2^127621243 is an apocalyptic number.

127621243 is a deficient number, since it is larger than the sum of its proper divisors (136565).

127621243 is an equidigital number, since it uses as much as digits as its factorization.

127621243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136564.

The product of its digits is 4032, while the sum is 28.

The square root of 127621243 is about 11296.9572452055. The cubic root of 127621243 is about 503.4708414363.

Adding to 127621243 its reverse (342126721), we get a palindrome (469747964).

The spelling of 127621243 in words is "one hundred twenty-seven million, six hundred twenty-one thousand, two hundred forty-three".