1285951 has 4 divisors (see below), whose sum is σ = 1288504. Its totient is φ = 1283400.

The previous prime is 1285943. The next prime is 1285969. The reversal of 1285951 is 1595821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1595821 = 61 ⋅26161.

It is a cyclic number.

It is not a de Polignac number, because 1285951 - 2³ = 1285943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (322126).

2^1285951 is an apocalyptic number.

1285951 is a deficient number, since it is larger than the sum of its proper divisors (2553).

1285951 is an equidigital number, since it uses as much as digits as its factorization.

1285951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552.

The product of its digits is 3600, while the sum is 31.

The square root of 1285951 is about 1133.9977954123. The cubic root of 1285951 is about 108.7447101844.

The spelling of 1285951 in words is "one million, two hundred eighty-five thousand, nine hundred fifty-one".