1551245 has 6 divisors (see below), whose sum is σ = 1864842. Its totient is φ = 1238768.

The previous prime is 1551241. The next prime is 1551269. The reversal of 1551245 is 5421551.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 40804 + 1510441 = 202^2 + 1229^2 .

It is not a de Polignac number, because 1551245 - 2² = 1551241 is a prime.

It is a super-2 number, since 2×1551245² = 4812722100050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1551245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551241) 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 5 ways as a sum of consecutive naturals, for example, 2507 + ... + 3063.

It is an arithmetic number, because the mean of its divisors is an integer number (310807).

2^1551245 is an apocalyptic number.

It is an amenable number.

1551245 is a deficient number, since it is larger than the sum of its proper divisors (313597).

1551245 is an frugal number, since it uses more digits than its factorization.

1551245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119 (or 562 counting only the distinct ones).

The product of its digits is 1000, while the sum is 23.

The square root of 1551245 is about 1245.4898634674. The cubic root of 1551245 is about 115.7604300615.

Adding to 1551245 its reverse (5421551), we get a palindrome (6972796).

The spelling of 1551245 in words is "one million, five hundred fifty-one thousand, two hundred forty-five".