1012551 has 4 divisors (see below), whose sum is σ = 1350072. Its totient is φ = 675032.

The previous prime is 1012549. The next prime is 1012559. The reversal of 1012551 is 1552101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1552101 = 3 ⋅517367.

It is a cyclic number.

It is not a de Polignac number, because 1012551 - 2¹ = 1012549 is a prime.

It is a D-number.

1012551 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168756 + ... + 168761.

It is an arithmetic number, because the mean of its divisors is an integer number (337518).

2^1012551 is an apocalyptic number.

1012551 is a deficient number, since it is larger than the sum of its proper divisors (337521).

1012551 is an equidigital number, since it uses as much as digits as its factorization.

1012551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337520.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1012551 is about 1006.2559316595. The cubic root of 1012551 is about 100.4166284633.

Adding to 1012551 its reverse (1552101), we get a palindrome (2564652).

It can be divided in two parts, 10 and 12551, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 1012551 in words is "one million, twelve thousand, five hundred fifty-one".