127640145 has 16 divisors (see below), whose sum is σ = 204429312. Its totient is φ = 68006400.

The previous prime is 127640137. The next prime is 127640153. The reversal of 127640145 is 541046721.

It is an interprime number because it is at equal distance from previous prime (127640137) and next prime (127640153).

It is not a de Polignac number, because 127640145 - 2³ = 127640137 is a prime.

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, 13569 + ... + 20961.

It is an arithmetic number, because the mean of its divisors is an integer number (12776832).

Almost surely, 2^127640145 is an apocalyptic number.

127640145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

127640145 is a deficient number, since it is larger than the sum of its proper divisors (76789167).

127640145 is a wasteful number, since it uses less digits than its factorization.

127640145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8552.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 127640145 is about 11297.7938111828. The cubic root of 127640145 is about 503.4956965880.

Adding to 127640145 its reverse (541046721), we get a palindrome (668686866).

The spelling of 127640145 in words is "one hundred twenty-seven million, six hundred forty thousand, one hundred forty-five".