127452991 has 4 divisors (see below), whose sum is σ = 129066400. Its totient is φ = 125839584.

The previous prime is 127452971. The next prime is 127453019. The reversal of 127452991 is 199254721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127452991 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127452911) 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, 806586 + ... + 806743.

It is an arithmetic number, because the mean of its divisors is an integer number (32266600).

Almost surely, 2^127452991 is an apocalyptic number.

127452991 is a deficient number, since it is larger than the sum of its proper divisors (1613409).

127452991 is an equidigital number, since it uses as much as digits as its factorization.

127452991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613408.

The product of its digits is 45360, while the sum is 40.

The square root of 127452991 is about 11289.5080052233. The cubic root of 127452991 is about 503.2494905398.

The spelling of 127452991 in words is "one hundred twenty-seven million, four hundred fifty-two thousand, nine hundred ninety-one".