1251215 has 12 divisors (see below), whose sum is σ = 1746936. Its totient is φ = 857808.

The previous prime is 1251179. The next prime is 1251227. The reversal of 1251215 is 5121521.

It is not a de Polignac number, because 1251215 - 2¹² = 1247119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1251193 and 1251202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2309 + ... + 2798.

It is an arithmetic number, because the mean of its divisors is an integer number (145578).

2^1251215 is an apocalyptic number.

1251215 is a deficient number, since it is larger than the sum of its proper divisors (495721).

1251215 is an equidigital number, since it uses as much as digits as its factorization.

1251215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126 (or 5119 counting only the distinct ones).

The product of its digits is 100, while the sum is 17.

The square root of 1251215 is about 1118.5772212950. The cubic root of 1251215 is about 107.7566250415.

Adding to 1251215 its reverse (5121521), we get a palindrome (6372736).

The spelling of 1251215 in words is "one million, two hundred fifty-one thousand, two hundred fifteen".