127121765 has 8 divisors (see below), whose sum is σ = 152681760. Its totient is φ = 101606992.

The previous prime is 127121741. The next prime is 127121777. The reversal of 127121765 is 567121721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127121765 - 2⁸ = 127121509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4775 + ... + 16644.

It is an arithmetic number, because the mean of its divisors is an integer number (19085220).

Almost surely, 2^127121765 is an apocalyptic number.

It is an amenable number.

127121765 is a deficient number, since it is larger than the sum of its proper divisors (25559995).

127121765 is a wasteful number, since it uses less digits than its factorization.

127121765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22611.

The product of its digits is 5880, while the sum is 32.

The square root of 127121765 is about 11274.8288235343. The cubic root of 127121765 is about 502.8131625489.

The spelling of 127121765 in words is "one hundred twenty-seven million, one hundred twenty-one thousand, seven hundred sixty-five".