1272045 has 16 divisors (see below), whose sum is σ = 2053440. Its totient is φ = 672384.

The previous prime is 1272043. The next prime is 1272049. The reversal of 1272045 is 5402721.

It is not a de Polignac number, because 1272045 - 2¹ = 1272043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1746 + ... + 2364.

It is an arithmetic number, because the mean of its divisors is an integer number (128340).

2^1272045 is an apocalyptic number.

1272045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1272045 is a deficient number, since it is larger than the sum of its proper divisors (781395).

1272045 is a wasteful number, since it uses less digits than its factorization.

1272045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 1272045 is about 1127.8497240324. The cubic root of 1272045 is about 108.3513079971.

Adding to 1272045 its reverse (5402721), we get a palindrome (6674766).

The spelling of 1272045 in words is "one million, two hundred seventy-two thousand, forty-five".