127621231 has 2 divisors, whose sum is σ = 127621232. Its totient is φ = 127621230.

The previous prime is 127621213. The next prime is 127621237. The reversal of 127621231 is 132126721.

It is a happy number.

Together with previous prime (127621213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 127621231 - 2¹⁵ = 127588463 is a prime.

It is a super-2 number, since 2×127621231² = 32574357203910722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 127621196 and 127621205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127621237) 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 as a sum of consecutive naturals, namely, 63810615 + 63810616.

It is an arithmetic number, because the mean of its divisors is an integer number (63810616).

Almost surely, 2^127621231 is an apocalyptic number.

127621231 is a deficient number, since it is larger than the sum of its proper divisors (1).

127621231 is an equidigital number, since it uses as much as digits as its factorization.

127621231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 127621231 is about 11296.9567140890. The cubic root of 127621231 is about 503.4708256562.

Adding to 127621231 its reverse (132126721), we get a palindrome (259747952).

The spelling of 127621231 in words is "one hundred twenty-seven million, six hundred twenty-one thousand, two hundred thirty-one".