1251245 has 8 divisors (see below), whose sum is σ = 1580640. Its totient is φ = 948240.

The previous prime is 1251227. The next prime is 1251247. The reversal of 1251245 is 5421521.

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

It is a de Polignac number, because none of the positive numbers 2^k-1251245 is a prime.

It is a super-2 number, since 2×1251245² = 3131228100050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251247) 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, 6491 + ... + 6680.

It is an arithmetic number, because the mean of its divisors is an integer number (197580).

2^1251245 is an apocalyptic number.

It is an amenable number.

1251245 is a deficient number, since it is larger than the sum of its proper divisors (329395).

1251245 is a wasteful number, since it uses less digits than its factorization.

1251245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13195.

The product of its digits is 400, while the sum is 20.

The square root of 1251245 is about 1118.5906311068. The cubic root of 1251245 is about 107.7574862505.

Adding to 1251245 its reverse (5421521), we get a palindrome (6672766).

The spelling of 1251245 in words is "one million, two hundred fifty-one thousand, two hundred forty-five".