1251915 has 16 divisors (see below), whose sum is σ = 2289408. Its totient is φ = 572256.

The previous prime is 1251911. The next prime is 1251919. The reversal of 1251915 is 5191521.

It is an interprime number because it is at equal distance from previous prime (1251911) and next prime (1251919).

It is not a de Polignac number, because 1251915 - 2² = 1251911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5857 + ... + 6066.

It is an arithmetic number, because the mean of its divisors is an integer number (143088).

2^1251915 is an apocalyptic number.

1251915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1251915 is a deficient number, since it is larger than the sum of its proper divisors (1037493).

1251915 is a wasteful number, since it uses less digits than its factorization.

1251915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11938.

The product of its digits is 450, while the sum is 24.

The square root of 1251915 is about 1118.8900750297. The cubic root of 1251915 is about 107.7767163328.

The spelling of 1251915 in words is "one million, two hundred fifty-one thousand, nine hundred fifteen".