1245240 has 64 divisors (see below), whose sum is σ = 4154400. Its totient is φ = 331776.

The previous prime is 1245227. The next prime is 1245281. The reversal of 1245240 is 425421.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 504 + ... + 1656.

2^1245240 is an apocalyptic number.

1245240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077200).

1245240 is an abundant number, since it is smaller than the sum of its proper divisors (2909160).

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

1245240 is a wasteful number, since it uses less digits than its factorization.

1245240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1245240 is about 1115.9032216102. The cubic root of 1245240 is about 107.5848257831.

It can be divided in two parts, 1245 and 240, that added together give a triangular number (1485 = T₅₄).

The spelling of 1245240 in words is "one million, two hundred forty-five thousand, two hundred forty".