1251257 has 8 divisors (see below), whose sum is σ = 1463616. Its totient is φ = 1047312.

The previous prime is 1251247. The next prime is 1251259. The reversal of 1251257 is 7521521.

It is a happy number.

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

It is not a de Polignac number, because 1251257 - 2¹⁴ = 1234873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1778 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (182952).

2^1251257 is an apocalyptic number.

It is an amenable number.

1251257 is a deficient number, since it is larger than the sum of its proper divisors (212359).

1251257 is an equidigital number, since it uses as much as digits as its factorization.

1251257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4207.

The product of its digits is 700, while the sum is 23.

The square root of 1251257 is about 1118.5959949866. The cubic root of 1251257 is about 107.7578307302.

Adding to 1251257 its reverse (7521521), we get a palindrome (8772778).

The spelling of 1251257 in words is "one million, two hundred fifty-one thousand, two hundred fifty-seven".