1551087 has 6 divisors (see below), whose sum is σ = 2240472. Its totient is φ = 1034052.

The previous prime is 1551083. The next prime is 1551089. The reversal of 1551087 is 7801551.

It is not a de Polignac number, because 1551087 - 2² = 1551083 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1551087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86163 + ... + 86180.

It is an arithmetic number, because the mean of its divisors is an integer number (373412).

2^1551087 is an apocalyptic number.

1551087 is a deficient number, since it is larger than the sum of its proper divisors (689385).

1551087 is a wasteful number, since it uses less digits than its factorization.

1551087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172349 (or 172346 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 1551087 is about 1245.4264329939. The cubic root of 1551087 is about 115.7564997198.

The spelling of 1551087 in words is "one million, five hundred fifty-one thousand, eighty-seven".