127212640 has 24 divisors (see below), whose sum is σ = 300540240. Its totient is φ = 50884992.

The previous prime is 127212637. The next prime is 127212643. The reversal of 127212640 is 46212721.

It is an interprime number because it is at equal distance from previous prime (127212637) and next prime (127212643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127212643) 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, 397380 + ... + 397699.

It is an arithmetic number, because the mean of its divisors is an integer number (12522510).

Almost surely, 2^127212640 is an apocalyptic number.

127212640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127212640 is an abundant number, since it is smaller than the sum of its proper divisors (173327600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127212640 is an equidigital number, since it uses as much as digits as its factorization.

127212640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795094 (or 795086 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 127212640 is about 11278.8580982296. The cubic root of 127212640 is about 502.9329486514.

The spelling of 127212640 in words is "one hundred twenty-seven million, two hundred twelve thousand, six hundred forty".