1272357 has 12 divisors (see below), whose sum is σ = 1856140. Its totient is φ = 839808.

The previous prime is 1272347. The next prime is 1272361. The reversal of 1272357 is 7532721.

It can be written as a sum of positive squares in 2 ways, for example, as 1147041 + 125316 = 1071^2 + 354^2 .

It is not a de Polignac number, because 1272357 - 2¹¹ = 1270309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333 + ... + 1629.

2^1272357 is an apocalyptic number.

It is an amenable number.

1272357 is a deficient number, since it is larger than the sum of its proper divisors (583783).

1272357 is a wasteful number, since it uses less digits than its factorization.

1272357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1409 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 1272357 is about 1127.9880318514. The cubic root of 1272357 is about 108.3601658715.

Adding to 1272357 its sum of digits (27), we get a square (1272384 = 1128²).

The spelling of 1272357 in words is "one million, two hundred seventy-two thousand, three hundred fifty-seven".