1255501 has 24 divisors (see below), whose sum is σ = 1581120. Its totient is φ = 988416.

The previous prime is 1255477. The next prime is 1255519. The reversal of 1255501 is 1055521.

1255501 = 248² + 249² + ... + 266².

It is not a de Polignac number, because 1255501 - 2¹¹ = 1253453 is a prime.

It is a super-2 number, since 2×1255501² = 3152565522002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

1255501 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255591) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54576 + ... + 54598.

It is an arithmetic number, because the mean of its divisors is an integer number (65880).

2^1255501 is an apocalyptic number.

It is an amenable number.

1255501 is a deficient number, since it is larger than the sum of its proper divisors (325619).

1255501 is a wasteful number, since it uses less digits than its factorization.

1255501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 1255501 is about 1120.4914100519. The cubic root of 1255501 is about 107.8795238641.

The spelling of 1255501 in words is "one million, two hundred fifty-five thousand, five hundred one".