1247001 has 24 divisors (see below), whose sum is σ = 2052000. Its totient is φ = 669312.

The previous prime is 1246997. The next prime is 1247009. The reversal of 1247001 is 1007421.

1247001 = T₁₀₈ + T₁₀₉ + ... + T₂₀₅.

It is not a de Polignac number, because 1247001 - 2² = 1246997 is a prime.

It is a super-2 number, since 2×1247001² = 3110022988002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1247009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2250 + ... + 2748.

It is an arithmetic number, because the mean of its divisors is an integer number (85500).

2^1247001 is an apocalyptic number.

It is an amenable number.

1247001 is a deficient number, since it is larger than the sum of its proper divisors (804999).

1247001 is a wasteful number, since it uses less digits than its factorization.

1247001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1247001 is about 1116.6919897626. The cubic root of 1247001 is about 107.6355168519.

The spelling of 1247001 in words is "one million, two hundred forty-seven thousand, one".