1262440 has 32 divisors (see below), whose sum is σ = 2920680. Its totient is φ = 490752.

The previous prime is 1262419. The next prime is 1262441. The reversal of 1262440 is 442621.

It can be written as a sum of positive squares in 4 ways, for example, as 964324 + 298116 = 982^2 + 546^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1262441) 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, 1054 + ... + 1906.

2^1262440 is an apocalyptic number.

1262440 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 1262440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460340).

1262440 is an abundant number, since it is smaller than the sum of its proper divisors (1658240).

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

1262440 is a wasteful number, since it uses less digits than its factorization.

1262440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1262440 is about 1123.5835527454. The cubic root of 1262440 is about 108.0779044678.

The spelling of 1262440 in words is "one million, two hundred sixty-two thousand, four hundred forty".