127690 has 12 divisors (see below), whose sum is σ = 231894. Its totient is φ = 50624.

The previous prime is 127681. The next prime is 127691. The reversal of 127690 is 96721.

It can be written as a sum of positive squares in 3 ways, for example, as 24649 + 103041 = 157^2 + 321^2 .

It is a super-2 number, since 2×127690² = 32609472200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (127691) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1074 + ... + 1186.

2¹²⁷⁶⁹⁰ is an apocalyptic number.

127690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127690 is a deficient number, since it is larger than the sum of its proper divisors (104204).

127690 is an equidigital number, since it uses as much as digits as its factorization.

127690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 127690 is about 357.3373755990. The cubic root of 127690 is about 50.3561241563.

The spelling of 127690 in words is "one hundred twenty-seven thousand, six hundred ninety".