127978245 has 16 divisors (see below), whose sum is σ = 227517120. Its totient is φ = 68254992.

The previous prime is 127978237. The next prime is 127978297. The reversal of 127978245 is 542879721.

It is a happy number.

It is not a de Polignac number, because 127978245 - 2³ = 127978237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 127978245.

It is a congruent number.

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, 473859 + ... + 474128.

It is an arithmetic number, because the mean of its divisors is an integer number (14219820).

Almost surely, 2^127978245 is an apocalyptic number.

127978245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

127978245 is a deficient number, since it is larger than the sum of its proper divisors (99538875).

127978245 is an equidigital number, since it uses as much as digits as its factorization.

127978245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948001 (or 947995 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 127978245 is about 11312.7470138778. The cubic root of 127978245 is about 503.9398666919.

It can be divided in two parts, 1279 and 78245, that added together give a square (79524 = 282²).

The spelling of 127978245 in words is "one hundred twenty-seven million, nine hundred seventy-eight thousand, two hundred forty-five".