1272660551 has 8 divisors (see below), whose sum is σ = 1303129344. Its totient is φ = 1242231480.

The previous prime is 1272660469. The next prime is 1272660553. The reversal of 1272660551 is 1550662721.

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

It is a cyclic number.

It is not a de Polignac number, because 1272660551 - 2²² = 1268466247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272660553) 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, 60866 + ... + 79056.

It is an arithmetic number, because the mean of its divisors is an integer number (162891168).

Almost surely, 2^1272660551 is an apocalyptic number.

1272660551 is a deficient number, since it is larger than the sum of its proper divisors (30468793).

1272660551 is a wasteful number, since it uses less digits than its factorization.

1272660551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19861.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 1272660551 is about 35674.3682635026. The cubic root of 1272660551 is about 1083.6878248390.

The spelling of 1272660551 in words is "one billion, two hundred seventy-two million, six hundred sixty thousand, five hundred fifty-one".