1551289 has 2 divisors, whose sum is σ = 1551290. Its totient is φ = 1551288.

The previous prime is 1551269. The next prime is 1551343. The reversal of 1551289 is 9821551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1537600 + 13689 = 1240^2 + 117^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551289 - 2⁹ = 1550777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1551289.

It is not a weakly prime, because it can be changed into another prime (1551229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775644 + 775645.

It is an arithmetic number, because the mean of its divisors is an integer number (775645).

2^1551289 is an apocalyptic number.

It is an amenable number.

1551289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551289 is an equidigital number, since it uses as much as digits as its factorization.

1551289 is an evil number, because the sum of its binary digits is even.

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

The square root of 1551289 is about 1245.5075270748. The cubic root of 1551289 is about 115.7615245395.

It can be divided in two parts, 155 and 1289, that added together give a square (1444 = 38²).

The spelling of 1551289 in words is "one million, five hundred fifty-one thousand, two hundred eighty-nine".