1255920 has 40 divisors (see below), whose sum is σ = 3894096. Its totient is φ = 334848.

The previous prime is 1255913. The next prime is 1255927. The reversal of 1255920 is 295521.

Added to its reverse (295521) it gives a triangular number (1551441 = T₁₇₆₁).

It is an interprime number because it is at equal distance from previous prime (1255913) and next prime (1255927).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2377 + ... + 2856.

2^1255920 is an apocalyptic number.

1255920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255920 is an abundant number, since it is smaller than the sum of its proper divisors (2638176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255920 is a wasteful number, since it uses less digits than its factorization.

1255920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249 (or 5243 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1255920 is about 1120.6783659909. The cubic root of 1255920 is about 107.8915234544.

Adding to 1255920 its reverse (295521), we get a triangular number (1551441 = T₁₇₆₁).

The spelling of 1255920 in words is "one million, two hundred fifty-five thousand, nine hundred twenty".