1272521 has 8 divisors (see below), whose sum is σ = 1351104. Its totient is φ = 1195920.

The previous prime is 1272461. The next prime is 1272539. The reversal of 1272521 is 1252721.

1272521 = T₁₇₃ + T₁₇₄ + ... + T₂₃₃.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272521 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1272493 and 1272502.

It is not an unprimeable number, because it can be changed into a prime (1272421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950 + ... + 1856.

It is an arithmetic number, because the mean of its divisors is an integer number (168888).

2^1272521 is an apocalyptic number.

It is an amenable number.

1272521 is a deficient number, since it is larger than the sum of its proper divisors (78583).

1272521 is an equidigital number, since it uses as much as digits as its factorization.

1272521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its digits is 280, while the sum is 20.

The square root of 1272521 is about 1128.0607253158. The cubic root of 1272521 is about 108.3648213531.

The spelling of 1272521 in words is "one million, two hundred seventy-two thousand, five hundred twenty-one".