1551485 has 8 divisors (see below), whose sum is σ = 2005080. Its totient is φ = 1145664.

The previous prime is 1551479. The next prime is 1551497. The reversal of 1551485 is 5841551.

It can be written as a sum of positive squares in 4 ways, for example, as 116281 + 1435204 = 341^2 + 1198^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1551485 - 2⁸ = 1551229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11870 + ... + 11999.

It is an arithmetic number, because the mean of its divisors is an integer number (250635).

2^1551485 is an apocalyptic number.

It is an amenable number.

1551485 is a deficient number, since it is larger than the sum of its proper divisors (453595).

1551485 is a wasteful number, since it uses less digits than its factorization.

1551485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23887.

The product of its digits is 4000, while the sum is 29.

The square root of 1551485 is about 1245.5862073739. The cubic root of 1551485 is about 115.7663996903.

The spelling of 1551485 in words is "one million, five hundred fifty-one thousand, four hundred eighty-five".