1427257 has 4 divisors (see below), whose sum is σ = 1537060. Its totient is φ = 1317456.

The previous prime is 1427233. The next prime is 1427281. The reversal of 1427257 is 7527241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7527241 = 1831 ⋅4111.

It is an interprime number because it is at equal distance from previous prime (1427233) and next prime (1427281).

It can be written as a sum of positive squares in 2 ways, for example, as 484416 + 942841 = 696^2 + 971^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427257 - 2¹⁵ = 1394489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54882 + ... + 54907.

It is an arithmetic number, because the mean of its divisors is an integer number (384265).

2^1427257 is an apocalyptic number.

It is an amenable number.

1427257 is a deficient number, since it is larger than the sum of its proper divisors (109803).

1427257 is a wasteful number, since it uses less digits than its factorization.

1427257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109802.

The product of its digits is 3920, while the sum is 28.

The square root of 1427257 is about 1194.6786178718. The cubic root of 1427257 is about 112.5902354224.

The spelling of 1427257 in words is "one million, four hundred twenty-seven thousand, two hundred fifty-seven".