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1275140 = 225103619
BaseRepresentation
bin100110111010100000100
32101210011102
410313110010
5311301030
643155232
713560416
oct4672404
92353142
101275140
117a1039
12515b18
13358529
142529b6
151a2c45
hex137504

1275140 has 24 divisors (see below), whose sum is σ = 2708160. Its totient is φ = 504288.

The previous prime is 1275133. The next prime is 1275173. The reversal of 1275140 is 415721.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1751 + ... + 2369.

It is an arithmetic number, because the mean of its divisors is an integer number (112840).

21275140 is an apocalyptic number.

1275140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275140 is an abundant number, since it is smaller than the sum of its proper divisors (1433020).

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

1275140 is a wasteful number, since it uses less digits than its factorization.

1275140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1275140 is about 1129.2209704039. The cubic root of 1275140 is about 108.4391129853.

The spelling of 1275140 in words is "one million, two hundred seventy-five thousand, one hundred forty".

Divisors: 1 2 4 5 10 20 103 206 412 515 619 1030 1238 2060 2476 3095 6190 12380 63757 127514 255028 318785 637570 1275140