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2801253 = 371331331
BaseRepresentation
bin1010101011111001100101
312021022121010
422223321211
51204120003
6140012433
732544630
oct12537145
95238533
102801253
111643694
12b31119
13771060
1452cc17
153a5003
hex2abe65

2801253 has 32 divisors (see below), whose sum is σ = 4759552. Its totient is φ = 1425600.

The previous prime is 2801251. The next prime is 2801257. The reversal of 2801253 is 3521082.

It is not a de Polignac number, because 2801253 - 21 = 2801251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2801251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8298 + ... + 8628.

It is an arithmetic number, because the mean of its divisors is an integer number (148736).

22801253 is an apocalyptic number.

It is an amenable number.

2801253 is a deficient number, since it is larger than the sum of its proper divisors (1958299).

2801253 is a wasteful number, since it uses less digits than its factorization.

2801253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2801253 is about 1673.6944165528. The cubic root of 2801253 is about 140.9669959471.

The spelling of 2801253 in words is "two million, eight hundred one thousand, two hundred fifty-three".

Divisors: 1 3 7 13 21 31 39 91 93 217 273 331 403 651 993 1209 2317 2821 4303 6951 8463 10261 12909 30121 30783 71827 90363 133393 215481 400179 933751 2801253