1551255 has 16 divisors (see below), whose sum is σ = 2613120. Its totient is φ = 783648.

The previous prime is 1551241. The next prime is 1551269. The reversal of 1551255 is 5521551.

1551255 = 555² + 556² + ... + 559².

It is an interprime number because it is at equal distance from previous prime (1551241) and next prime (1551269).

It is not a de Polignac number, because 1551255 - 2⁶ = 1551191 is a prime.

1551255 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2437 + ... + 3006.

It is an arithmetic number, because the mean of its divisors is an integer number (163320).

2^1551255 is an apocalyptic number.

1551255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1551255 is a deficient number, since it is larger than the sum of its proper divisors (1061865).

1551255 is a wasteful number, since it uses less digits than its factorization.

1551255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470.

The product of its digits is 1250, while the sum is 24.

The square root of 1551255 is about 1245.4938779456. The cubic root of 1551255 is about 115.7606788083.

The spelling of 1551255 in words is "one million, five hundred fifty-one thousand, two hundred fifty-five".