127720465 has 16 divisors (see below), whose sum is σ = 158653440. Its totient is φ = 98602560.

The previous prime is 127720421. The next prime is 127720477. The reversal of 127720465 is 564027721.

It is not a de Polignac number, because 127720465 - 2¹⁷ = 127589393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127720465.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67107 + ... + 68983.

It is an arithmetic number, because the mean of its divisors is an integer number (9915840).

Almost surely, 2^127720465 is an apocalyptic number.

It is an amenable number.

127720465 is a deficient number, since it is larger than the sum of its proper divisors (30932975).

127720465 is a wasteful number, since it uses less digits than its factorization.

127720465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 127720465 is about 11301.3479284553. The cubic root of 127720465 is about 503.6012858721.

The spelling of 127720465 in words is "one hundred twenty-seven million, seven hundred twenty thousand, four hundred sixty-five".