1651249 has 4 divisors (see below), whose sum is σ = 1667700. Its totient is φ = 1634800.

The previous prime is 1651229. The next prime is 1651259. The reversal of 1651249 is 9421561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9421561 = 379 ⋅24859.

It can be written as a sum of positive squares in 2 ways, for example, as 1000000 + 651249 = 1000^2 + 807^2 .

It is a cyclic number.

It is not a de Polignac number, because 1651249 - 2¹⁵ = 1618481 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 (1651219) 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, 8074 + ... + 8275.

It is an arithmetic number, because the mean of its divisors is an integer number (416925).

2^1651249 is an apocalyptic number.

It is an amenable number.

1651249 is a deficient number, since it is larger than the sum of its proper divisors (16451).

1651249 is a wasteful number, since it uses less digits than its factorization.

1651249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16450.

The product of its digits is 2160, while the sum is 28.

The square root of 1651249 is about 1285.0093384875. The cubic root of 1651249 is about 118.1963836988.

It can be divided in two parts, 16512 and 49, that added together give a palindrome (16561).

The spelling of 1651249 in words is "one million, six hundred fifty-one thousand, two hundred forty-nine".