127221490 has 32 divisors (see below), whose sum is σ = 250905600. Its totient is φ = 46060800.

The previous prime is 127221481. The next prime is 127221491. The reversal of 127221490 is 94122721.

It is not an unprimeable number, because it can be changed into a prime (127221491) 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 15 ways as a sum of consecutive naturals, for example, 24111 + ... + 28909.

It is an arithmetic number, because the mean of its divisors is an integer number (7840800).

Almost surely, 2^127221490 is an apocalyptic number.

127221490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127221490 is a deficient number, since it is larger than the sum of its proper divisors (123684110).

127221490 is a wasteful number, since it uses less digits than its factorization.

127221490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5058.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 127221490 is about 11279.2504183567. The cubic root of 127221490 is about 502.9446111544.

The spelling of 127221490 in words is "one hundred twenty-seven million, two hundred twenty-one thousand, four hundred ninety".