1201440 has 48 divisors (see below), whose sum is σ = 3786048. Its totient is φ = 320256.

The previous prime is 1201439. The next prime is 1201469. The reversal of 1201440 is 441021.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772 + ... + 1731.

It is an arithmetic number, because the mean of its divisors is an integer number (78876).

2^1201440 is an apocalyptic number.

1201440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201440 is an abundant number, since it is smaller than the sum of its proper divisors (2584608).

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

1201440 is a wasteful number, since it uses less digits than its factorization.

1201440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521 (or 2513 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1201440 is about 1096.1021850174. The cubic root of 1201440 is about 106.3083462698.

Adding to 1201440 its reverse (441021), we get a palindrome (1642461).

The spelling of 1201440 in words is "one million, two hundred one thousand, four hundred forty".