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1206740 = 22560337
BaseRepresentation
bin100100110100111010100
32021022100002
410212213110
5302103430
641510432
713154123
oct4464724
92238302
101206740
11754707
124a2418
13333362
14235aba
1518c845
hex1269d4

1206740 has 12 divisors (see below), whose sum is σ = 2534196. Its totient is φ = 482688.

The previous prime is 1206731. The next prime is 1206743. The reversal of 1206740 is 476021.

It can be written as a sum of positive squares in 2 ways, for example, as 258064 + 948676 = 508^2 + 974^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 60337 = 1206740 / (1 + 2 + 0 + 6 + 7 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30149 + ... + 30188.

It is an arithmetic number, because the mean of its divisors is an integer number (211183).

21206740 is an apocalyptic number.

1206740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1206740 is an abundant number, since it is smaller than the sum of its proper divisors (1327456).

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

1206740 is a wasteful number, since it uses less digits than its factorization.

1206740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60346 (or 60344 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1206740 is about 1098.5171823872. The cubic root of 1206740 is about 106.4644388902.

The spelling of 1206740 in words is "one million, two hundred six thousand, seven hundred forty".

Divisors: 1 2 4 5 10 20 60337 120674 241348 301685 603370 1206740