1249440 has 96 divisors (see below), whose sum is σ = 4173120. Its totient is φ = 313344.

The previous prime is 1249433. The next prime is 1249477. The reversal of 1249440 is 449421.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1249440² = 3122200627200, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1249440.

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, 9052 + ... + 9188.

It is an arithmetic number, because the mean of its divisors is an integer number (43470).

2^1249440 is an apocalyptic number.

1249440 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 1249440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2086560).

1249440 is an abundant number, since it is smaller than the sum of its proper divisors (2923680).

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

1249440 is a wasteful number, since it uses less digits than its factorization.

1249440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1249440 is about 1117.7835210809. The cubic root of 1249440 is about 107.7056456531.

The spelling of 1249440 in words is "one million, two hundred forty-nine thousand, four hundred forty".