1272655101 has 8 divisors (see below), whose sum is σ = 1698923680. Its totient is φ = 847411632.

The previous prime is 1272655099. The next prime is 1272655127. The reversal of 1272655101 is 1015562721.

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

It is not a de Polignac number, because 1272655101 - 2¹ = 1272655099 is a prime.

It is a super-2 number, since 2×1272655101² = 3239302012202640402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272655201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253375 + ... + 258348.

It is an arithmetic number, because the mean of its divisors is an integer number (212365460).

Almost surely, 2^1272655101 is an apocalyptic number.

It is an amenable number.

1272655101 is a deficient number, since it is larger than the sum of its proper divisors (426268579).

1272655101 is an equidigital number, since it uses as much as digits as its factorization.

1272655101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512555.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 1272655101 is about 35674.2918780457. The cubic root of 1272655101 is about 1083.6862779204.

The spelling of 1272655101 in words is "one billion, two hundred seventy-two million, six hundred fifty-five thousand, one hundred one".