1361257 has 4 divisors (see below), whose sum is σ = 1368576. Its totient is φ = 1353940.

The previous prime is 1361197. The next prime is 1361273. The reversal of 1361257 is 7521631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7521631 = 13 ⋅578587.

It is a cyclic number.

It is not a de Polignac number, because 1361257 - 2¹¹ = 1359209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361287) 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, 3373 + ... + 3754.

It is an arithmetic number, because the mean of its divisors is an integer number (342144).

2^1361257 is an apocalyptic number.

It is an amenable number.

1361257 is a deficient number, since it is larger than the sum of its proper divisors (7319).

1361257 is an equidigital number, since it uses as much as digits as its factorization.

1361257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7318.

The product of its digits is 1260, while the sum is 25.

The square root of 1361257 is about 1166.7291888009. The cubic root of 1361257 is about 110.8272886949.

Adding to 1361257 its reverse (7521631), we get a palindrome (8882888).

The spelling of 1361257 in words is "one million, three hundred sixty-one thousand, two hundred fifty-seven".