1551425 has 6 divisors (see below), whose sum is σ = 1923798. Its totient is φ = 1241120.

The previous prime is 1551383. The next prime is 1551449. The reversal of 1551425 is 5241551.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 55696 + 1495729 = 236^2 + 1223^2 .

It is not a de Polignac number, because 1551425 - 2¹⁰ = 1550401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1551425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31004 + ... + 31053.

It is an arithmetic number, because the mean of its divisors is an integer number (320633).

2^1551425 is an apocalyptic number.

It is an amenable number.

1551425 is a deficient number, since it is larger than the sum of its proper divisors (372373).

1551425 is an equidigital number, since it uses as much as digits as its factorization.

1551425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62067 (or 62062 counting only the distinct ones).

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

The square root of 1551425 is about 1245.5621220959. The cubic root of 1551425 is about 115.7649073408.

Adding to 1551425 its reverse (5241551), we get a palindrome (6792976).

The spelling of 1551425 in words is "one million, five hundred fifty-one thousand, four hundred twenty-five".