1551285 has 16 divisors (see below), whose sum is σ = 2758080. Its totient is φ = 827280.

The previous prime is 1551269. The next prime is 1551289. The reversal of 1551285 is 5821551.

It is not a de Polignac number, because 1551285 - 2⁴ = 1551269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5611 + ... + 5880.

It is an arithmetic number, because the mean of its divisors is an integer number (172380).

2^1551285 is an apocalyptic number.

1551285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1551285 is a deficient number, since it is larger than the sum of its proper divisors (1206795).

1551285 is a wasteful number, since it uses less digits than its factorization.

1551285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11505 (or 11499 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1551285 is about 1245.5059213027. The cubic root of 1551285 is about 115.7614250424.

The spelling of 1551285 in words is "one million, five hundred fifty-one thousand, two hundred eighty-five".