127422661 has 4 divisors (see below), whose sum is σ = 127463212. Its totient is φ = 127382112.

The previous prime is 127422649. The next prime is 127422671. The reversal of 127422661 is 166224721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 58216900 + 69205761 = 7630^2 + 8319^2 .

It is a cyclic number.

It is not a de Polignac number, because 127422661 - 2⁹ = 127422149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127422671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15126 + ... + 21991.

It is an arithmetic number, because the mean of its divisors is an integer number (31865803).

Almost surely, 2^127422661 is an apocalyptic number.

It is an amenable number.

127422661 is a deficient number, since it is larger than the sum of its proper divisors (40551).

127422661 is an equidigital number, since it uses as much as digits as its factorization.

127422661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40550.

The product of its digits is 8064, while the sum is 31.

The square root of 127422661 is about 11288.1646426689. The cubic root of 127422661 is about 503.2095679303.

The spelling of 127422661 in words is "one hundred twenty-seven million, four hundred twenty-two thousand, six hundred sixty-one".