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8144945 = 51628989
BaseRepresentation
bin11111000100100000110001
3120022210202122
4133010200301
54041114240
6450324025
7126142124
oct37044061
916283678
108144945
114663466
122889615
1318c23c3
1411203bb
15aad4b5
hex7c4831

8144945 has 4 divisors (see below), whose sum is σ = 9773940. Its totient is φ = 6515952.

The previous prime is 8144933. The next prime is 8144951. The reversal of 8144945 is 5494418.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6210064 + 1934881 = 2492^2 + 1391^2 .

It is a cyclic number.

It is not a de Polignac number, because 8144945 - 210 = 8143921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814490 + ... + 814499.

It is an arithmetic number, because the mean of its divisors is an integer number (2443485).

Almost surely, 28144945 is an apocalyptic number.

It is an amenable number.

8144945 is a deficient number, since it is larger than the sum of its proper divisors (1628995).

8144945 is a wasteful number, since it uses less digits than its factorization.

8144945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628994.

The product of its digits is 23040, while the sum is 35.

The square root of 8144945 is about 2853.9350027637. The cubic root of 8144945 is about 201.2006527415.

The spelling of 8144945 in words is "eight million, one hundred forty-four thousand, nine hundred forty-five".

Divisors: 1 5 1628989 8144945